upower: fix cross-compilation support

Disable gtk-doc and introspection when cross-compiling

pkgs/os-specific/linux/upower/default.nix

@@ -18,13 +18,15 @@
 , systemd
 , useIMobileDevice ? true
 , libimobiledevice
+, withDocs ? (stdenv.buildPlatform == stdenv.hostPlatform)
 }:
 
 stdenv.mkDerivation rec {
   pname = "upower";
   version = "0.99.17";
 
-  outputs = [ "out" "dev" "devdoc" ];
+  outputs = [ "out" "dev" ]
+    ++ lib.optionals withDocs [ "devdoc" ];
 
   src = fetchFromGitLab {
     domain = "gitlab.freedesktop.org";
@@ -34,6 +36,12 @@ stdenv.mkDerivation rec {
     sha256 = "xvvqzGxgkuGcvnO12jnLURNJUoSlnMw2g/mnII+i6Bs=";
   };
 
+  strictDeps = true;
+
+  depsBuildBuild = [
+    pkg-config
+  ];
+
   nativeBuildInputs = [
     meson
     ninja
@@ -66,6 +74,8 @@ stdenv.mkDerivation rec {
     "-Dos_backend=linux"
     "-Dsystemdsystemunitdir=${placeholder "out"}/etc/systemd/system"
     "-Dudevrulesdir=${placeholder "out"}/lib/udev/rules.d"
+    "-Dintrospection=${if (stdenv.buildPlatform == stdenv.hostPlatform) then "auto" else "disabled"}"
+    "-Dgtk-doc=${lib.boolToString withDocs}"
   ];
 
   doCheck = false; # fails with "env: './linux/integration-test': No such file or directory"