diff --git a/flake.nix b/flake.nix
index ae28a75..4a1a72e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,13 +9,14 @@
 
       # git revision to use (for version and git pull
       gitRevision = "llvmorg-17-init";
+      # gitRevision = "603c286334b07f568d39f6706c848f576914f323";
 
       # to work with older version of flakes
       lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";
 
       # Generate a user-friendly version number.
-      version = builtins.substring 0 8 lastModifiedDate;
-      # version = gitRevision;
+      #version = builtins.substring 0 8 lastModifiedDate;
+      version = gitRevision;
 
       # System types to support.
       supportedSystems = [ "x86_64-linux" ]; #"x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];