diff --git a/flake.nix b/flake.nix
index d3a144c4..bd4ba2eb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -31,10 +31,11 @@
           src = pkgs.lib.cleanSourceWith { src = self; };
 
           cargoLock.lockFile = ./Cargo.lock;
-          GIT_COMMIT_HASH_SHORT = self.rev or "dirty"; #  or self.dirtyRev;
 
+          GIT_COMMIT_HASH_SHORT = self.shortRev or "dirty"; # or self.dirtyRev;
           postPatch = ''
-          substituteInPlace crates/aiken/src/cmd/mod.rs --replace  "built_info::GIT_COMMIT_HASH_SHORT" "\"$GIT_COMMIT_HASH_SHORT\".to_string()"
+            substituteInPlace crates/aiken/src/cmd/mod.rs \
+              --replace  "built_info::GIT_COMMIT_HASH_SHORT" "\"$GIT_COMMIT_HASH_SHORT\".to_string()"
           '';
           
           postInstall = ''