nix: add COMMITS var

nix/default.nix

@@ -39,6 +39,7 @@
   wrapRuntimeDeps ? true,
   version ? "git",
   commit,
+  revCount,
   date,
   # deprecated flags
   enableNvidiaPatches ? false,
@@ -73,7 +74,7 @@ assert lib.assertMsg (!hidpiXWayland) "The option `hidpiXWayland` has been remov
       sed -i "s#@PREFIX@/##g" hyprland.pc.in
     '';
 
-    COMMITS = commit;
+    COMMITS = revCount;
     DATE = date;
     DIRTY = lib.optionalString (commit == "") "dirty";
     HASH = commit;

nix/overlays.nix

@@ -34,6 +34,7 @@ in {
         stdenv = final.gcc14Stdenv;
         version = "${version}+date=${date}_${self.shortRev or "dirty"}";
         commit = self.rev or "";
+        revCount = self.sourceInfo.revCount or "";
         inherit date;
       };
       hyprland-unwrapped = final.hyprland.override {wrapRuntimeDeps = false;};