1 files changed, 1 insertions, 1 deletions
diff --git a/infra/libkookie/nixpkgs/pkgs/development/interpreters/acl2/default.nix b/infra/libkookie/nixpkgs/pkgs/development/interpreters/acl2/default.nix
index 9ad95645240b..83b54e442aa3 100644
--- a/infra/libkookie/nixpkgs/pkgs/development/interpreters/acl2/default.nix
+++ b/infra/libkookie/nixpkgs/pkgs/development/interpreters/acl2/default.nix
@@ -21,7 +21,7 @@ in stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "acl2-devel";
     repo = "acl2-devel";
-    rev = "${version}";
+    rev = version;
     sha256 = "0c0wimaf16nrr3d6cxq6p7nr7rxffvpmn66hkpwc1m6zpcipf0y5";
   };