util-linux: Fix build on non-Linux

Build logs show:

> configure: WARNING: non-linux system; not building mount
> configure: WARNING: non-linux system; not building swapon

So skip these on non-Linux

Using getOutput prevents eval failures on other platforms.
Things should stay eval'able with NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1

Co-authored-by: Artturin <Artturin@artturin.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/pkgs/os-specific/linux/util-linux/default.nix b/pkgs/os-specific/linux/util-linux/default.nix
index bd87c07879c..9a335010c87 100644
--- a/pkgs/os-specific/linux/util-linux/default.nix
+++ b/pkgs/os-specific/linux/util-linux/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   # the greater util-linux toolset.
   # Compatibility is maintained by symlinking the binaries from the
   # smaller outputs in the bin output.
-  outputs = [ "bin" "dev" "out" "lib" "man" "mount" "login" "swap" ];
+  outputs = [ "bin" "dev" "out" "lib" "man" ] ++ lib.optionals stdenv.isLinux [ "mount" ] ++ [ "login" ] ++ lib.optionals stdenv.isLinux [ "swap" ];
   separateDebugInfo = true;
 
   postPatch = ''
@@ -110,20 +110,23 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  postInstall = ''
+  postInstall = lib.optionalString stdenv.isLinux ''
     moveToOutput bin/mount "$mount"
     moveToOutput bin/umount "$mount"
     ln -svf "$mount/bin/"* $bin/bin/
+    '' + ''
 
     moveToOutput sbin/nologin "$login"
     moveToOutput sbin/sulogin "$login"
     prefix=$login _moveSbin
     ln -svf "$login/bin/"* $bin/bin/
+    '' + lib.optionalString stdenv.isLinux ''
 
     moveToOutput sbin/swapon "$swap"
     moveToOutput sbin/swapoff "$swap"
     prefix=$swap _moveSbin
     ln -svf "$swap/bin/"* $bin/bin/
+    '' + ''
 
     installShellCompletion --bash bash-completion/*
   '';