diff --git a/flake.nix b/flake.nix
index db67c3bd..a283b261 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,7 +32,7 @@
 
           cargoLock.lockFile = ./Cargo.lock;
 
-          GIT_COMMIT_HASH_SHORT = self.shortRev or "dirty"; # or self.dirtyRev;
+          GIT_COMMIT_HASH_SHORT = self.shortRev or "unknown";
           postPatch = ''
             substituteInPlace crates/aiken/src/cmd/mod.rs \
               --replace  "built_info::GIT_COMMIT_HASH_SHORT" \