diff --git a/flake.nix b/flake.nix
index 6c44e91..6cc9b30 100644
--- a/flake.nix
+++ b/flake.nix
@@ -97,6 +97,7 @@
     , tsRevProx, taskobs, mcchunkie, gqrss, darwin, xin-secrets, talon, peerix
     , ... }@inputs:
     let
+      xinlib = import ./lib;
       supportedSystems = [ "x86_64-linux" ];
       #[ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
       forAllSystems = unstable.lib.genAttrs supportedSystems;
@@ -158,7 +159,10 @@
       buildSys = sys: sysBase: extraMods: name:
         sysBase.lib.nixosSystem {
           system = sys;
-          specialArgs = { inherit inputs; };
+          specialArgs = {
+            inherit inputs;
+            inherit xinlib;
+          };
           modules = hostBase.modules ++ extraMods ++ [{
             nix = {
               registry.nixpkgs.flake = sysBase;
diff --git a/hosts/europa/default.nix b/hosts/europa/default.nix
index 663a324..159b41e 100644
--- a/hosts/europa/default.nix
+++ b/hosts/europa/default.nix
@@ -1,16 +1,10 @@
-{ config, pkgs, lib, modulesPath, inputs, ... }:
+{ config, pkgs, lib, modulesPath, inputs, xinlib, ... }:
 let
   myEmacs = pkgs.callPackage ../../configs/emacs.nix { };
   peerixUser = if builtins.hasAttr "peerix" config.users.users then
     config.users.users.peerix.name
   else
     "root";
-  mkCronScript = name: src: ''
-    . /etc/profile;
-    set -x
-    # autogenreated ${name}
-    ${src}
-  '';
   jobs = [
     {
       name = "brain";
@@ -31,14 +25,6 @@ let
       path = [ pkgs.taskobs ] ++ pkgs.taskobs.buildInputs;
     }
   ];
-  jobToService = job: {
-    name = "${job.name}";
-    value = {
-      script = mkCronScript "${job.name}_script" job.script;
-      inherit (job) startAt;
-      inherit (job) path;
-    };
-  };
 in {
   _module.args.isUnstable = true;
 
@@ -200,7 +186,7 @@ in {
     '';
   };
 
-  systemd.user.services = lib.listToAttrs (builtins.map jobToService jobs);
+  systemd.user.services = lib.listToAttrs (builtins.map xinlib.jobToService jobs);
   systemd.services."whytailscalewhy" = {
     description = "Tailscale restart on resume";
     wantedBy = [ "post-resume.target" ];
diff --git a/hosts/pwntie/default.nix b/hosts/pwntie/default.nix
index 1d372e1..15904df 100644
--- a/hosts/pwntie/default.nix
+++ b/hosts/pwntie/default.nix
@@ -1,32 +1,16 @@
-{ config, pkgs, lib, ... }:
+{ config, pkgs, lib, xinlib, ... }:
 
 let
   myEmacs = pkgs.callPackage ../../configs/emacs.nix { };
   pubKeys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO7v+/xS8832iMqJHCWsxUZ8zYoMWoZhjj++e26g1fLT europa"
   ];
-  mkCronScript = name: src: ''
-    . /etc/profile;
-    set -x
-    # autogenreated ${name}
-    ${src}
-  '';
-  jobs = [
-    {
-      name = "xin-ci";
-      script = "cd ~/src/xin && ./ci";
-      startAt = "daily";
-      path = [ ];
-    }
-  ];
-  jobToService = job: {
-    name = "${job.name}";
-    value = {
-      script = mkCronScript "${job.name}_script" job.script;
-      inherit (job) startAt;
-      inherit (job) path;
-    };
-  };
+  jobs = [{
+    name = "xin-ci";
+    script = "cd ~/src/xin && ./ci";
+    startAt = "daily";
+    path = [ ];
+  }];
 in {
   _module.args.isUnstable = true;
   imports = [ ./hardware-configuration.nix ];
@@ -37,7 +21,7 @@ in {
   boot.loader.efi.efiSysMountPoint = "/boot/efi";
   boot.kernelPackages = pkgs.linuxPackages_latest;
 
-  systemd.user.services = lib.listToAttrs (builtins.map jobToService jobs);
+  systemd.user.services = lib.listToAttrs (builtins.map xinlib.jobToService jobs);
 
   networking = {
     hostName = "pwntie";
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 0000000..62cc92c
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,18 @@
+let
+  mkCronScript = name: src: ''
+    . /etc/profile;
+    set -x
+    # autogenreated ${name}
+    ${src}
+  '';
+  jobToService = job: {
+    name = "${job.name}";
+    value = {
+      script = mkCronScript "${job.name}_script" job.script;
+      inherit (job) startAt path;
+    };
+  };
+
+  xinlib = { inherit mkCronScript jobToService; };
+
+in xinlib