fltk: do not propagate fontconfig (#357470)

pkgs/by-name/gi/giada/package.nix

@@ -1,24 +1,26 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, cmake
-, pkg-config
-, fltk
-, fmt
-, rtmidi
-, libsamplerate
-, libmpg123
-, libsndfile
-, jack2
-, alsa-lib
-, libpulseaudio
-, libXpm
-, libXrandr
-, flac
-, libogg
-, libvorbis
-, libopus
-, nlohmann_json
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  pkg-config,
+  fltk,
+  fontconfig,
+  fmt,
+  rtmidi,
+  libsamplerate,
+  libmpg123,
+  libsndfile,
+  jack2,
+  alsa-lib,
+  libpulseaudio,
+  libXpm,
+  libXrandr,
+  flac,
+  libogg,
+  libvorbis,
+  libopus,
+  nlohmann_json,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -47,24 +49,28 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
-  buildInputs = [
-    rtmidi
-    fltk
-    fmt
-    libmpg123
-    libsndfile
-    libsamplerate
-    nlohmann_json
-    alsa-lib
-    libXpm
-    libpulseaudio
-    jack2
-    flac
-    libogg
-    libvorbis
-    libopus
-    libXrandr
-  ];
+  buildInputs =
+    [
+      rtmidi
+      fltk
+      fmt
+      libmpg123
+      libsndfile
+      libsamplerate
+      nlohmann_json
+      alsa-lib
+      libXpm
+      libpulseaudio
+      jack2
+      flac
+      libogg
+      libvorbis
+      libopus
+      libXrandr
+    ]
+    ++ lib.optionals (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isFreeBSD) [
+      fontconfig
+    ];
 
   meta = {
     description = "Free, minimal, hardcore audio tool for DJs, live performers and electronic musicians";

pkgs/development/libraries/fltk/common.nix

@@ -85,6 +85,8 @@ stdenv.mkDerivation rec {
     libGLU
   ] ++ lib.optionals (withExamples && withGL) [
     glew
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
+    fontconfig
   ];
 
   propagatedBuildInputs = [
@@ -93,7 +95,6 @@ stdenv.mkDerivation rec {
     libpng
   ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     freetype
-    fontconfig
     libX11
     libXext
     libXinerama