hyprland: update env variables, add muparser dep

pkgs/by-name/hy/hyprland/package.nix

@@ -27,6 +27,7 @@
   libuuid,
   libxkbcommon,
   libgbm,
+  muparser,
   pango,
   pciutils,
   pkgconf,
@@ -109,14 +110,16 @@ customStdenv.mkDerivation (finalAttrs: {
     sed -i "s#@PREFIX@/##g" hyprland.pc.in
   '';
 
-  # variables used by generateVersion.sh script, and shown in `hyprctl version`
-  BRANCH = info.branch;
-  COMMITS = info.commit_hash;
-  DATE = info.date;
-  DIRTY = "";
-  HASH = info.commit_hash;
-  MESSAGE = info.commit_message;
-  TAG = info.tag;
+  # variables used by CMake, and shown in `hyprctl version`
+  env = {
+    GIT_BRANCH = info.branch;
+    GIT_COMMITS = info.commit_hash;
+    GIT_COMMIT_DATE = info.date;
+    GIT_DIRTY = "clean";
+    GIT_COMMIT_HASH = info.commit_hash;
+    GIT_COMMIT_MESSAGE = info.commit_message;
+    GIT_TAG = info.tag;
+  };
 
   depsBuildBuild = [
     # to find wayland-scanner when cross-compiling
@@ -157,6 +160,7 @@ customStdenv.mkDerivation (finalAttrs: {
       libuuid
       libxkbcommon
       libgbm
+      muparser
       pango
       pciutils
       re2