diff --git a/src/buildscript_darwin_386.sh b/src/buildscript_darwin_386.sh
index e96ff4bc49b..f5d00898d6a 100755
--- a/src/buildscript_darwin_386.sh
+++ b/src/buildscript_darwin_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/darwin_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_darwin.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_386.go ./syscall_bsd.go ./syscall_darwin.go ./syscall_darwin_386.go ./syscall_unix.go ./zerrors_darwin_386.go ./zsyscall_darwin_386.go ./zsysnum_darwin_386.go ./ztypes_darwin_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_darwin.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_darwin.go ./syscall_darwin_386.go ./syscall_unix.go ./zerrors_darwin_386.go ./zsyscall_darwin_386.go ./zsysnum_darwin_386.go ./ztypes_darwin_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_darwin_386.8 -DGOOS_darwin -DGOARCH_386 ./asm_darwin_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_darwin_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/darwin_386/syscall.a
diff --git a/src/buildscript_darwin_amd64.sh b/src/buildscript_darwin_amd64.sh
index c9ec0a0639a..36d18aee6fe 100755
--- a/src/buildscript_darwin_amd64.sh
+++ b/src/buildscript_darwin_amd64.sh
@@ -231,7 +231,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/darwin_amd64/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_darwin.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_bsd.go ./syscall_darwin.go ./syscall_darwin_amd64.go ./syscall_unix.go ./zerrors_darwin_amd64.go ./zsyscall_darwin_amd64.go ./zsysnum_darwin_amd64.go ./ztypes_darwin_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_darwin.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_darwin.go ./syscall_darwin_amd64.go ./syscall_unix.go ./zerrors_darwin_amd64.go ./zsyscall_darwin_amd64.go ./zsysnum_darwin_amd64.go ./ztypes_darwin_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_darwin_amd64.6 -DGOOS_darwin -DGOARCH_amd64 ./asm_darwin_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_darwin_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/darwin_amd64/syscall.a
diff --git a/src/buildscript_freebsd_386.sh b/src/buildscript_freebsd_386.sh
index fbd6acd0928..d482e6f57fb 100755
--- a/src/buildscript_freebsd_386.sh
+++ b/src/buildscript_freebsd_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/freebsd_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_freebsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_386.go ./syscall_bsd.go ./syscall_freebsd.go ./syscall_freebsd_386.go ./syscall_unix.go ./zerrors_freebsd_386.go ./zsyscall_freebsd_386.go ./zsysnum_freebsd_386.go ./ztypes_freebsd_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_freebsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_freebsd.go ./syscall_freebsd_386.go ./syscall_unix.go ./zerrors_freebsd_386.go ./zsyscall_freebsd_386.go ./zsysnum_freebsd_386.go ./ztypes_freebsd_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_freebsd_386.8 -DGOOS_freebsd -DGOARCH_386 ./asm_freebsd_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_freebsd_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/freebsd_386/syscall.a
diff --git a/src/buildscript_freebsd_amd64.sh b/src/buildscript_freebsd_amd64.sh
index f82c9f76f88..d24377b195a 100755
--- a/src/buildscript_freebsd_amd64.sh
+++ b/src/buildscript_freebsd_amd64.sh
@@ -231,7 +231,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/freebsd_amd64/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_freebsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_bsd.go ./syscall_freebsd.go ./syscall_freebsd_amd64.go ./syscall_unix.go ./zerrors_freebsd_amd64.go ./zsyscall_freebsd_amd64.go ./zsysnum_freebsd_amd64.go ./ztypes_freebsd_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_freebsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_freebsd.go ./syscall_freebsd_amd64.go ./syscall_unix.go ./zerrors_freebsd_amd64.go ./zsyscall_freebsd_amd64.go ./zsysnum_freebsd_amd64.go ./ztypes_freebsd_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_freebsd_amd64.6 -DGOOS_freebsd -DGOARCH_amd64 ./asm_freebsd_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_freebsd_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/freebsd_amd64/syscall.a
diff --git a/src/buildscript_linux_386.sh b/src/buildscript_linux_386.sh
index 70ce585e9e3..ad8424253a1 100755
--- a/src/buildscript_linux_386.sh
+++ b/src/buildscript_linux_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/linux_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_386.go ./syscall_linux.go ./syscall_linux_386.go ./syscall_unix.go ./zerrors_linux_386.go ./zsyscall_linux_386.go ./zsysnum_linux_386.go ./ztypes_linux_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_linux.go ./syscall_linux_386.go ./syscall_unix.go ./zerrors_linux_386.go ./zsyscall_linux_386.go ./zsysnum_linux_386.go ./ztypes_linux_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_linux_386.8 -DGOOS_linux -DGOARCH_386 ./asm_linux_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_linux_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/linux_386/syscall.a
diff --git a/src/buildscript_linux_amd64.sh b/src/buildscript_linux_amd64.sh
index dc1f3959097..e02b6f8a2f7 100755
--- a/src/buildscript_linux_amd64.sh
+++ b/src/buildscript_linux_amd64.sh
@@ -231,7 +231,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/linux_amd64/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_linux.go ./syscall_linux_amd64.go ./syscall_unix.go ./zerrors_linux_amd64.go ./zsyscall_linux_amd64.go ./zsysnum_linux_amd64.go ./ztypes_linux_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_linux.go ./syscall_linux_amd64.go ./syscall_unix.go ./zerrors_linux_amd64.go ./zsyscall_linux_amd64.go ./zsysnum_linux_amd64.go ./ztypes_linux_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_linux_amd64.6 -DGOOS_linux -DGOARCH_amd64 ./asm_linux_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_linux_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/linux_amd64/syscall.a
diff --git a/src/buildscript_linux_arm.sh b/src/buildscript_linux_arm.sh
index a1718a2bd24..58027b8702a 100755
--- a/src/buildscript_linux_arm.sh
+++ b/src/buildscript_linux_arm.sh
@@ -235,7 +235,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/linux_arm/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-5g -o "$WORK"/syscall/_obj/_go_.5 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_arm.go ./syscall_linux.go ./syscall_linux_arm.go ./syscall_unix.go ./zerrors_linux_arm.go ./zsyscall_linux_arm.go ./zsysnum_linux_arm.go ./ztypes_linux_arm.go
+5g -o "$WORK"/syscall/_obj/_go_.5 -p syscall -I "$WORK" ./env_unix.go ./exec_linux.go ./exec_unix.go ./lsf_linux.go ./netlink_linux.go ./sockcmsg_linux.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_linux.go ./syscall_linux_arm.go ./syscall_unix.go ./zerrors_linux_arm.go ./zsyscall_linux_arm.go ./zsysnum_linux_arm.go ./ztypes_linux_arm.go
 5a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_linux_arm.5 -DGOOS_linux -DGOARCH_arm ./asm_linux_arm.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.5 "$WORK"/syscall/_obj/asm_linux_arm.5
 cp "$WORK"/syscall.a "$GOROOT"/pkg/linux_arm/syscall.a
diff --git a/src/buildscript_netbsd_386.sh b/src/buildscript_netbsd_386.sh
index 01b62564dea..1a2c43f3b9a 100755
--- a/src/buildscript_netbsd_386.sh
+++ b/src/buildscript_netbsd_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/netbsd_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_netbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_386.go ./syscall_bsd.go ./syscall_netbsd.go ./syscall_netbsd_386.go ./syscall_unix.go ./zerrors_netbsd_386.go ./zsyscall_netbsd_386.go ./zsysnum_netbsd_386.go ./ztypes_netbsd_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_netbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_netbsd.go ./syscall_netbsd_386.go ./syscall_unix.go ./zerrors_netbsd_386.go ./zsyscall_netbsd_386.go ./zsysnum_netbsd_386.go ./ztypes_netbsd_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_netbsd_386.8 -DGOOS_netbsd -DGOARCH_386 ./asm_netbsd_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_netbsd_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/netbsd_386/syscall.a
diff --git a/src/buildscript_netbsd_amd64.sh b/src/buildscript_netbsd_amd64.sh
index 3589e83974f..7d6f647b642 100755
--- a/src/buildscript_netbsd_amd64.sh
+++ b/src/buildscript_netbsd_amd64.sh
@@ -231,7 +231,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/netbsd_amd64/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_netbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_bsd.go ./syscall_netbsd.go ./syscall_netbsd_amd64.go ./syscall_unix.go ./zerrors_netbsd_amd64.go ./zsyscall_netbsd_amd64.go ./zsysnum_netbsd_amd64.go ./ztypes_netbsd_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_netbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_netbsd.go ./syscall_netbsd_amd64.go ./syscall_unix.go ./zerrors_netbsd_amd64.go ./zsyscall_netbsd_amd64.go ./zsysnum_netbsd_amd64.go ./ztypes_netbsd_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_netbsd_amd64.6 -DGOOS_netbsd -DGOARCH_amd64 ./asm_netbsd_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_netbsd_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/netbsd_amd64/syscall.a
diff --git a/src/buildscript_openbsd_386.sh b/src/buildscript_openbsd_386.sh
index 02f3f6f8270..2b44b08af0d 100755
--- a/src/buildscript_openbsd_386.sh
+++ b/src/buildscript_openbsd_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/openbsd_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_openbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_386.go ./syscall_bsd.go ./syscall_openbsd.go ./syscall_openbsd_386.go ./syscall_unix.go ./zerrors_openbsd_386.go ./zsyscall_openbsd_386.go ./zsysctl_openbsd.go ./zsysnum_openbsd_386.go ./ztypes_openbsd_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_openbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_openbsd.go ./syscall_openbsd_386.go ./syscall_unix.go ./zerrors_openbsd_386.go ./zsyscall_openbsd_386.go ./zsysctl_openbsd.go ./zsysnum_openbsd_386.go ./ztypes_openbsd_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_openbsd_386.8 -DGOOS_openbsd -DGOARCH_386 ./asm_openbsd_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_openbsd_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/openbsd_386/syscall.a
diff --git a/src/buildscript_openbsd_amd64.sh b/src/buildscript_openbsd_amd64.sh
index e3850ba0098..ea3fca38539 100755
--- a/src/buildscript_openbsd_amd64.sh
+++ b/src/buildscript_openbsd_amd64.sh
@@ -231,7 +231,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/openbsd_amd64/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_openbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_bsd.go ./syscall_openbsd.go ./syscall_openbsd_amd64.go ./syscall_unix.go ./zerrors_openbsd_amd64.go ./zsyscall_openbsd_amd64.go ./zsysctl_openbsd.go ./zsysnum_openbsd_amd64.go ./ztypes_openbsd_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./bpf_bsd.go ./env_unix.go ./exec_bsd.go ./exec_unix.go ./route_bsd.go ./route_openbsd.go ./sockcmsg_unix.go ./str.go ./syscall.go ./syscall_bsd.go ./syscall_openbsd.go ./syscall_openbsd_amd64.go ./syscall_unix.go ./zerrors_openbsd_amd64.go ./zsyscall_openbsd_amd64.go ./zsysctl_openbsd.go ./zsysnum_openbsd_amd64.go ./ztypes_openbsd_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_openbsd_amd64.6 -DGOOS_openbsd -DGOARCH_amd64 ./asm_openbsd_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_openbsd_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/openbsd_amd64/syscall.a
diff --git a/src/buildscript_plan9_386.sh b/src/buildscript_plan9_386.sh
index 0f6504d0dd7..f4e2050f527 100755
--- a/src/buildscript_plan9_386.sh
+++ b/src/buildscript_plan9_386.sh
@@ -232,7 +232,7 @@ cp "$WORK"/encoding/base64.a "$GOROOT"/pkg/plan9_386/encoding/base64.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./env_plan9.go ./exec_plan9.go ./str.go ./syscall.go ./syscall_386.go ./syscall_plan9.go ./syscall_plan9_386.go ./zerrors_plan9_386.go ./zsyscall_plan9_386.go ./zsysnum_plan9_386.go ./ztypes_plan9_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./env_plan9.go ./exec_plan9.go ./str.go ./syscall.go ./syscall_plan9.go ./syscall_plan9_386.go ./zerrors_plan9_386.go ./zsyscall_plan9_386.go ./zsysnum_plan9_386.go ./ztypes_plan9_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_plan9_386.8 -DGOOS_plan9 -DGOARCH_386 ./asm_plan9_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_plan9_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/plan9_386/syscall.a
diff --git a/src/buildscript_windows_386.sh b/src/buildscript_windows_386.sh
index 871d1454627..dc104dc364b 100755
--- a/src/buildscript_windows_386.sh
+++ b/src/buildscript_windows_386.sh
@@ -244,7 +244,7 @@ cp "$WORK"/unicode/utf16.a "$GOROOT"/pkg/windows_386/unicode/utf16.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./dll_windows.go ./env_windows.go ./exec_windows.go ./str.go ./syscall.go ./syscall_386.go ./syscall_windows.go ./syscall_windows_386.go ./zerrors_windows.go ./zerrors_windows_386.go ./zsyscall_windows_386.go ./zsysnum_windows_386.go ./ztypes_windows.go ./ztypes_windows_386.go
+8g -o "$WORK"/syscall/_obj/_go_.8 -p syscall -I "$WORK" ./dll_windows.go ./env_windows.go ./exec_windows.go ./str.go ./syscall.go ./syscall_windows.go ./syscall_windows_386.go ./zerrors_windows.go ./zerrors_windows_386.go ./zsyscall_windows_386.go ./zsysnum_windows_386.go ./ztypes_windows.go ./ztypes_windows_386.go
 8a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_windows_386.8 -DGOOS_windows -DGOARCH_386 ./asm_windows_386.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.8 "$WORK"/syscall/_obj/asm_windows_386.8
 cp "$WORK"/syscall.a "$GOROOT"/pkg/windows_386/syscall.a
diff --git a/src/buildscript_windows_amd64.sh b/src/buildscript_windows_amd64.sh
index cbabd0f9bbd..0bfb4a517f9 100755
--- a/src/buildscript_windows_amd64.sh
+++ b/src/buildscript_windows_amd64.sh
@@ -243,7 +243,7 @@ cp "$WORK"/unicode/utf16.a "$GOROOT"/pkg/windows_amd64/unicode/utf16.a
 
 mkdir -p "$WORK"/syscall/_obj/
 cd "$GOROOT"/src/pkg/syscall
-6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./dll_windows.go ./env_windows.go ./exec_windows.go ./str.go ./syscall.go ./syscall_amd64.go ./syscall_windows.go ./syscall_windows_amd64.go ./zerrors_windows.go ./zerrors_windows_amd64.go ./zsyscall_windows_amd64.go ./zsysnum_windows_amd64.go ./ztypes_windows.go ./ztypes_windows_amd64.go
+6g -o "$WORK"/syscall/_obj/_go_.6 -p syscall -I "$WORK" ./dll_windows.go ./env_windows.go ./exec_windows.go ./str.go ./syscall.go ./syscall_windows.go ./syscall_windows_amd64.go ./zerrors_windows.go ./zerrors_windows_amd64.go ./zsyscall_windows_amd64.go ./zsysnum_windows_amd64.go ./ztypes_windows.go ./ztypes_windows_amd64.go
 6a -I "$WORK"/syscall/_obj/ -o "$WORK"/syscall/_obj/asm_windows_amd64.6 -DGOOS_windows -DGOARCH_amd64 ./asm_windows_amd64.s
 gopack grc "$WORK"/syscall.a "$WORK"/syscall/_obj/_go_.6 "$WORK"/syscall/_obj/asm_windows_amd64.6
 cp "$WORK"/syscall.a "$GOROOT"/pkg/windows_amd64/syscall.a
diff --git a/src/pkg/debug/gosym/pclntab_test.go b/src/pkg/debug/gosym/pclntab_test.go
index e5c29889b7f..b90181bdc64 100644
--- a/src/pkg/debug/gosym/pclntab_test.go
+++ b/src/pkg/debug/gosym/pclntab_test.go
@@ -7,14 +7,14 @@ package gosym
 import (
 	"debug/elf"
 	"os"
-	"syscall"
+	"runtime"
 	"testing"
 )
 
 func dotest() bool {
 	// For now, only works on ELF platforms.
 	// TODO: convert to work with new go tool
-	return false && syscall.OS == "linux" && os.Getenv("GOARCH") == "amd64"
+	return false && runtime.GOOS == "linux" && runtime.GOARCH == "amd64"
 }
 
 func getTable(t *testing.T) *Table {
diff --git a/src/pkg/net/file_test.go b/src/pkg/net/file_test.go
index 7867fa8df36..868388efa1c 100644
--- a/src/pkg/net/file_test.go
+++ b/src/pkg/net/file_test.go
@@ -8,7 +8,6 @@ import (
 	"os"
 	"reflect"
 	"runtime"
-	"syscall"
 	"testing"
 )
 
@@ -67,7 +66,7 @@ func TestFileListener(t *testing.T) {
 		testFileListener(t, "tcp", "127.0.0.1")
 		testFileListener(t, "tcp", "[::ffff:127.0.0.1]")
 	}
-	if syscall.OS == "linux" {
+	if runtime.GOOS == "linux" {
 		testFileListener(t, "unix", "@gotest/net")
 		testFileListener(t, "unixpacket", "@gotest/net")
 	}
@@ -132,7 +131,7 @@ func TestFilePacketConn(t *testing.T) {
 	if supportsIPv6 && supportsIPv4map {
 		testFilePacketConnDial(t, "udp", "[::ffff:127.0.0.1]:12345")
 	}
-	if syscall.OS == "linux" {
+	if runtime.GOOS == "linux" {
 		testFilePacketConnListen(t, "unixgram", "@gotest1/net")
 	}
 }
diff --git a/src/pkg/net/server_test.go b/src/pkg/net/server_test.go
index 7d17ccd53c3..5475d3874fe 100644
--- a/src/pkg/net/server_test.go
+++ b/src/pkg/net/server_test.go
@@ -10,7 +10,6 @@ import (
 	"os"
 	"runtime"
 	"strings"
-	"syscall"
 	"testing"
 )
 
@@ -115,7 +114,7 @@ func doTest(t *testing.T, network, listenaddr, dialaddr string) {
 }
 
 func TestTCPServer(t *testing.T) {
-	if syscall.OS != "openbsd" {
+	if runtime.GOOS != "openbsd" {
 		doTest(t, "tcp", "", "127.0.0.1")
 	}
 	doTest(t, "tcp", "0.0.0.0", "127.0.0.1")
@@ -155,7 +154,7 @@ func TestUnixServer(t *testing.T) {
 	os.Remove("/tmp/gotest.net")
 	doTest(t, "unix", "/tmp/gotest.net", "/tmp/gotest.net")
 	os.Remove("/tmp/gotest.net")
-	if syscall.OS == "linux" {
+	if runtime.GOOS == "linux" {
 		doTest(t, "unixpacket", "/tmp/gotest.net", "/tmp/gotest.net")
 		os.Remove("/tmp/gotest.net")
 		// Test abstract unix domain socket, a Linux-ism
@@ -237,7 +236,7 @@ func TestUnixDatagramServer(t *testing.T) {
 		doTestPacket(t, "unixgram", "/tmp/gotest1.net", "/tmp/gotest1.net", isEmpty)
 		os.Remove("/tmp/gotest1.net")
 		os.Remove("/tmp/gotest1.net.local")
-		if syscall.OS == "linux" {
+		if runtime.GOOS == "linux" {
 			// Test abstract unix domain socket, a Linux-ism
 			doTestPacket(t, "unixgram", "@gotest1/net", "@gotest1/net", isEmpty)
 		}
diff --git a/src/pkg/os/os_test.go b/src/pkg/os/os_test.go
index 2a666f780e6..ec8c50986fe 100644
--- a/src/pkg/os/os_test.go
+++ b/src/pkg/os/os_test.go
@@ -11,8 +11,8 @@ import (
 	"io/ioutil"
 	. "os"
 	"path/filepath"
+	"runtime"
 	"strings"
-	"syscall"
 	"testing"
 	"time"
 )
@@ -35,7 +35,7 @@ type sysDir struct {
 }
 
 var sysdir = func() (sd *sysDir) {
-	switch syscall.OS {
+	switch runtime.GOOS {
 	case "windows":
 		sd = &sysDir{
 			Getenv("SystemRoot") + "\\system32\\drivers\\etc",
@@ -89,7 +89,7 @@ func size(name string, t *testing.T) int64 {
 }
 
 func equal(name1, name2 string) (r bool) {
-	switch syscall.OS {
+	switch runtime.GOOS {
 	case "windows":
 		r = strings.ToLower(name1) == strings.ToLower(name2)
 	default:
@@ -103,7 +103,7 @@ func newFile(testName string, t *testing.T) (f *File) {
 	// On Unix, override $TMPDIR in case the user
 	// has it set to an NFS-mounted directory.
 	dir := ""
-	if syscall.OS != "windows" {
+	if runtime.GOOS != "windows" {
 		dir = "/tmp"
 	}
 	f, err := ioutil.TempFile(dir, "_Go_"+testName)
@@ -278,7 +278,7 @@ func smallReaddirnames(file *File, length int, t *testing.T) []string {
 func TestReaddirnamesOneAtATime(t *testing.T) {
 	// big directory that doesn't change often.
 	dir := "/usr/bin"
-	switch syscall.OS {
+	switch runtime.GOOS {
 	case "windows":
 		dir = Getenv("SystemRoot") + "\\system32"
 	case "plan9":
@@ -382,7 +382,7 @@ func TestReaddirNValues(t *testing.T) {
 
 func TestHardLink(t *testing.T) {
 	// Hardlinks are not supported under windows or Plan 9.
-	if syscall.OS == "windows" || syscall.OS == "plan9" {
+	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
 		return
 	}
 	from, to := "hardlinktestfrom", "hardlinktestto"
@@ -415,7 +415,7 @@ func TestHardLink(t *testing.T) {
 
 func TestSymLink(t *testing.T) {
 	// Symlinks are not supported under windows or Plan 9.
-	if syscall.OS == "windows" || syscall.OS == "plan9" {
+	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
 		return
 	}
 	from, to := "symlinktestfrom", "symlinktestto"
@@ -477,7 +477,7 @@ func TestSymLink(t *testing.T) {
 
 func TestLongSymlink(t *testing.T) {
 	// Symlinks are not supported under windows or Plan 9.
-	if syscall.OS == "windows" || syscall.OS == "plan9" {
+	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
 		return
 	}
 	s := "0123456789abcdef"
@@ -547,7 +547,7 @@ func exec(t *testing.T, dir, cmd string, args []string, expect string) {
 func TestStartProcess(t *testing.T) {
 	var dir, cmd, le string
 	var args []string
-	if syscall.OS == "windows" {
+	if runtime.GOOS == "windows" {
 		le = "\r\n"
 		cmd = Getenv("COMSPEC")
 		dir = Getenv("SystemRoot")
@@ -578,7 +578,7 @@ func checkMode(t *testing.T, path string, mode FileMode) {
 
 func TestChmod(t *testing.T) {
 	// Chmod is not supported under windows.
-	if syscall.OS == "windows" {
+	if runtime.GOOS == "windows" {
 		return
 	}
 	f := newFile("TestChmod", t)
@@ -680,7 +680,7 @@ func TestChtimes(t *testing.T) {
 	*/
 	pat := Atime(postStat)
 	pmt := postStat.ModTime()
-	if !pat.Before(at) && syscall.OS != "plan9" {
+	if !pat.Before(at) && runtime.GOOS != "plan9" {
 		t.Errorf("AccessTime didn't go backwards; was=%d, after=%d", at, pat)
 	}
 
@@ -691,7 +691,7 @@ func TestChtimes(t *testing.T) {
 
 func TestChdirAndGetwd(t *testing.T) {
 	// TODO(brainman): file.Chdir() is not implemented on windows.
-	if syscall.OS == "windows" {
+	if runtime.GOOS == "windows" {
 		return
 	}
 	fd, err := Open(".")
@@ -702,7 +702,7 @@ func TestChdirAndGetwd(t *testing.T) {
 	// (unlike, say, /var, /etc, and /tmp).
 	dirs := []string{"/", "/usr/bin"}
 	// /usr/bin does not usually exist on Plan 9.
-	if syscall.OS == "plan9" {
+	if runtime.GOOS == "plan9" {
 		dirs = []string{"/", "/usr"}
 	}
 	for mode := 0; mode < 2; mode++ {
@@ -830,7 +830,7 @@ func TestOpenError(t *testing.T) {
 			t.Errorf("Open(%q, %d) returns error of %T type; want *PathError", tt.path, tt.mode, err)
 		}
 		if perr.Err != tt.error {
-			if syscall.OS == "plan9" {
+			if runtime.GOOS == "plan9" {
 				syscallErrStr := perr.Err.Error()
 				expectedErrStr := strings.Replace(tt.error.Error(), "file ", "", 1)
 				if !strings.HasSuffix(syscallErrStr, expectedErrStr) {
@@ -888,7 +888,7 @@ func run(t *testing.T, cmd []string) string {
 func TestHostname(t *testing.T) {
 	// There is no other way to fetch hostname on windows, but via winapi.
 	// On Plan 9 it is can be taken from #c/sysname as Hostname() does.
-	if syscall.OS == "windows" || syscall.OS == "plan9" {
+	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
 		return
 	}
 
diff --git a/src/pkg/os/os_unix_test.go b/src/pkg/os/os_unix_test.go
index 1f800d78cca..1bdcd748bc0 100644
--- a/src/pkg/os/os_unix_test.go
+++ b/src/pkg/os/os_unix_test.go
@@ -8,6 +8,7 @@ package os_test
 
 import (
 	. "os"
+	"runtime"
 	"syscall"
 	"testing"
 )
@@ -29,7 +30,7 @@ func checkUidGid(t *testing.T, path string, uid, gid int) {
 func TestChown(t *testing.T) {
 	// Chown is not supported under windows or Plan 9.
 	// Plan9 provides a native ChownPlan9 version instead.
-	if syscall.OS == "windows" || syscall.OS == "plan9" {
+	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
 		return
 	}
 	// Use TempDir() to make sure we're on a local file system,
diff --git a/src/pkg/os/path_test.go b/src/pkg/os/path_test.go
index 89d66c29ef9..18634ba410e 100644
--- a/src/pkg/os/path_test.go
+++ b/src/pkg/os/path_test.go
@@ -8,7 +8,6 @@ import (
 	. "os"
 	"path/filepath"
 	"runtime"
-	"syscall"
 	"testing"
 )
 
@@ -63,7 +62,7 @@ func TestMkdirAll(t *testing.T) {
 		t.Fatalf("MkdirAll %q returned wrong error path: %q not %q", ffpath, filepath.Clean(perr.Path), filepath.Clean(fpath))
 	}
 
-	if syscall.OS == "windows" {
+	if runtime.GOOS == "windows" {
 		path := `_test\_TestMkdirAll_\dir\.\dir2\`
 		err := MkdirAll(path, 0777)
 		if err != nil {
@@ -117,7 +116,7 @@ func TestRemoveAll(t *testing.T) {
 
 	// Determine if we should run the following test.
 	testit := true
-	if syscall.OS == "windows" {
+	if runtime.GOOS == "windows" {
 		// Chmod is not supported under windows.
 		testit = false
 	} else {
diff --git a/src/pkg/syscall/Makefile b/src/pkg/syscall/Makefile
index ed009d25ce8..68a6cd45ada 100644
--- a/src/pkg/syscall/Makefile
+++ b/src/pkg/syscall/Makefile
@@ -8,7 +8,6 @@ TARG=syscall
 GOFILES=\
 	str.go\
 	syscall.go\
-	syscall_$(GOARCH).go\
 	syscall_$(GOOS).go\
 	syscall_$(GOOS)_$(GOARCH).go\
 	zerrors_$(GOOS)_$(GOARCH).go\
diff --git a/src/pkg/syscall/exec_bsd.go b/src/pkg/syscall/exec_bsd.go
index 2240727f147..fc72c9af8ce 100644
--- a/src/pkg/syscall/exec_bsd.go
+++ b/src/pkg/syscall/exec_bsd.go
@@ -7,6 +7,7 @@
 package syscall
 
 import (
+	"runtime"
 	"unsafe"
 )
 
@@ -41,7 +42,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
 	// guard against side effects of shuffling fds below.
 	fd := append([]int(nil), attr.Files...)
 
-	darwin := OS == "darwin"
+	darwin := runtime.GOOS == "darwin"
 
 	// About to call fork.
 	// No more allocation or calls of non-assembly functions.
diff --git a/src/pkg/syscall/exec_unix.go b/src/pkg/syscall/exec_unix.go
index 59696732c57..ad3cf48c80e 100644
--- a/src/pkg/syscall/exec_unix.go
+++ b/src/pkg/syscall/exec_unix.go
@@ -9,6 +9,7 @@
 package syscall
 
 import (
+	"runtime"
 	"sync"
 	"unsafe"
 )
@@ -131,7 +132,7 @@ func forkExec(argv0 string, argv []string, attr *ProcAttr) (pid int, err error)
 	argvp := StringSlicePtr(argv)
 	envvp := StringSlicePtr(attr.Env)
 
-	if OS == "freebsd" && len(argv[0]) > len(argv0) {
+	if runtime.GOOS == "freebsd" && len(argv[0]) > len(argv0) {
 		argvp[0] = argv0p
 	}
 
diff --git a/src/pkg/syscall/syscall_386.go b/src/pkg/syscall/syscall_386.go
deleted file mode 100644
index cb948b87a2a..00000000000
--- a/src/pkg/syscall/syscall_386.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2010 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package syscall
-
-const ARCH = "386"
diff --git a/src/pkg/syscall/syscall_amd64.go b/src/pkg/syscall/syscall_amd64.go
deleted file mode 100644
index 75c3eac6f2a..00000000000
--- a/src/pkg/syscall/syscall_amd64.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2010 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package syscall
-
-const ARCH = "amd64"
diff --git a/src/pkg/syscall/syscall_arm.go b/src/pkg/syscall/syscall_arm.go
deleted file mode 100644
index b9d1ca0c087..00000000000
--- a/src/pkg/syscall/syscall_arm.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2010 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package syscall
-
-const ARCH = "arm"
diff --git a/src/pkg/syscall/syscall_bsd.go b/src/pkg/syscall/syscall_bsd.go
index 00c2d34c7d2..16f20981cc4 100644
--- a/src/pkg/syscall/syscall_bsd.go
+++ b/src/pkg/syscall/syscall_bsd.go
@@ -12,7 +12,10 @@
 
 package syscall
 
-import "unsafe"
+import (
+	"runtime"
+	"unsafe"
+)
 
 /*
  * Pseudo-system calls
@@ -554,7 +557,7 @@ func Sysctl(name string) (value string, err error) {
 		// Work around a bug that was fixed after OpenBSD 5.0.
 		// The length for kern.hostname and kern.domainname is always
 		// returned as 0 when a nil value is passed for oldp.
-		if OS == "openbsd" && (name == "kern.hostname" || name == "kern.domainname") {
+		if runtime.GOOS == "openbsd" && (name == "kern.hostname" || name == "kern.domainname") {
 			// MAXHOSTNAMELEN
 			n = 256
 		} else {
diff --git a/src/pkg/syscall/syscall_darwin.go b/src/pkg/syscall/syscall_darwin.go
index fbef0e114cf..cf876ed6491 100644
--- a/src/pkg/syscall/syscall_darwin.go
+++ b/src/pkg/syscall/syscall_darwin.go
@@ -14,8 +14,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "darwin"
-
 type SockaddrDatalink struct {
 	Len    uint8
 	Family uint8
diff --git a/src/pkg/syscall/syscall_freebsd.go b/src/pkg/syscall/syscall_freebsd.go
index 4962c746697..5be16da9654 100644
--- a/src/pkg/syscall/syscall_freebsd.go
+++ b/src/pkg/syscall/syscall_freebsd.go
@@ -14,8 +14,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "freebsd"
-
 type SockaddrDatalink struct {
 	Len    uint8
 	Family uint8
diff --git a/src/pkg/syscall/syscall_linux.go b/src/pkg/syscall/syscall_linux.go
index 3a1331c71cd..d0e16271d5d 100644
--- a/src/pkg/syscall/syscall_linux.go
+++ b/src/pkg/syscall/syscall_linux.go
@@ -13,8 +13,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "linux"
-
 /*
  * Wrapped
  */
diff --git a/src/pkg/syscall/syscall_netbsd.go b/src/pkg/syscall/syscall_netbsd.go
index fcbf6157b82..77ca9501b76 100644
--- a/src/pkg/syscall/syscall_netbsd.go
+++ b/src/pkg/syscall/syscall_netbsd.go
@@ -14,8 +14,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "netbsd"
-
 type SockaddrDatalink struct {
 	Len    uint8
 	Family uint8
diff --git a/src/pkg/syscall/syscall_openbsd.go b/src/pkg/syscall/syscall_openbsd.go
index 16247e982ca..adbbf3dd260 100644
--- a/src/pkg/syscall/syscall_openbsd.go
+++ b/src/pkg/syscall/syscall_openbsd.go
@@ -14,8 +14,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "openbsd"
-
 type SockaddrDatalink struct {
 	Len    uint8
 	Family uint8
diff --git a/src/pkg/syscall/syscall_plan9.go b/src/pkg/syscall/syscall_plan9.go
index 292847d6ce4..cd348f890db 100644
--- a/src/pkg/syscall/syscall_plan9.go
+++ b/src/pkg/syscall/syscall_plan9.go
@@ -13,8 +13,6 @@ package syscall
 
 import "unsafe"
 
-const OS = "plan9"
-
 const ImplementsGetwd = true
 
 // ErrorString implements Error's String method by returning itself.
diff --git a/src/pkg/syscall/syscall_unix.go b/src/pkg/syscall/syscall_unix.go
index 9cc9bc3c16e..cc1e4f7aa88 100644
--- a/src/pkg/syscall/syscall_unix.go
+++ b/src/pkg/syscall/syscall_unix.go
@@ -7,6 +7,7 @@
 package syscall
 
 import (
+	"runtime"
 	"sync"
 	"unsafe"
 )
@@ -17,7 +18,7 @@ var (
 	Stderr = 2
 )
 
-const darwinAMD64 = OS == "darwin" && ARCH == "amd64"
+const darwinAMD64 = runtime.GOOS == "darwin" && runtime.GOARCH == "amd64"
 
 func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
diff --git a/src/pkg/syscall/syscall_windows.go b/src/pkg/syscall/syscall_windows.go
index 441cc3747b0..b77a0779c51 100644
--- a/src/pkg/syscall/syscall_windows.go
+++ b/src/pkg/syscall/syscall_windows.go
@@ -11,8 +11,6 @@ import (
 	"unsafe"
 )
 
-const OS = "windows"
-
 type Handle uintptr
 
 const InvalidHandle = ^Handle(0)