lxqt: use modified LXQtConfigVars CMake macro

LXQt uses the values in this macro to set installation
directories and in the case of lxqt-session to substitute in paths.
However, by doing this all the paths are from within lxqt-build-tools
prefix. By utilizing a setup hook we can set the directories with the
correct prefix as cmake flags.

1 files changed, 9 insertions, 2 deletions

diff --git a/pkgs/desktops/lxqt/lxqt-build-tools/default.nix b/pkgs/desktops/lxqt/lxqt-build-tools/default.nix
index d202ba95d3e6..626c99fcf9c9 100644
--- a/pkgs/desktops/lxqt/lxqt-build-tools/default.nix
+++ b/pkgs/desktops/lxqt/lxqt-build-tools/default.nix
@@ -11,11 +11,18 @@ mkDerivation rec {
     sha256 = "0i7m9s4g5rsw28vclc9nh0zcapx85cqfwxkx7rrw7wa12svy7pm2";
   };
 
-  nativeBuildInputs = [ cmake pkgconfig ];
+  nativeBuildInputs = [ cmake pkgconfig setupHook ];
 
   buildInputs = [ qtbase glib pcre ];
 
-  preConfigure = ''cmakeFlags+=" -DLXQT_ETC_XDG_DIR=$out/etc/xdg"'';
+  setupHook = ./setup-hook.sh;
+
+  # We're dependent on this macro doing add_definitions in most places
+  # But we have the setup-hook to set the values.
+  postInstall = ''
+    rm $out/share/cmake/lxqt-build-tools/modules/LXQtConfigVars.cmake
+    cp ${./LXQtConfigVars.cmake} $out/share/cmake/lxqt-build-tools/modules/LXQtConfigVars.cmake
+  '';
 
   meta = with lib; {
     description = "Various packaging tools and scripts for LXQt applications";