diff --git a/lib.nix b/lib.nix
index 83f209b..6dda21f 100644
--- a/lib.nix
+++ b/lib.nix
@@ -108,7 +108,6 @@ rec
                     url = val.git;
                   } // lib.optionalAttrs (val ? rev) {
                     rev = val.rev;
-                    ref = val.rev;
                   } // lib.optionalAttrs (val ? branch) {
                     ref = val.branch;
                   } // lib.optionalAttrs (val ? tag) {