diff --git a/flake.nix b/flake.nix
index c5e499c..ce4179f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -249,16 +249,26 @@
                 i="0"
 
                 flake=0
+                immutable=0
+
+                for arg in "$@" ; do
+                  if [[ "$arg" =~ "^git+file://.*$" ]] ; then
+                    immutable=1
+                  fi
+                done
 
                 for arg in "$@" ; do
                   case "$arg" in
-                    build|eval)
+                    build|eval|run)
                       new_args[$i]="$arg"
                       new_args[$(($i + 1))]="--reference-lock-file"
                       new_args[$(($i + 2))]="flake-secret.lock"
-                      new_args[$(($i + 3))]="--output-lock-file"
-                      new_args[$(($i + 4))]="flake-secret.lock"
-                      i="$(($i + 5))"
+                      if [[ "$immutable" != 0 ]] ; then
+                        new_args[$(($i + 3))]="--output-lock-file"
+                        new_args[$(($i + 4))]="flake-secret.lock"
+                        i="$(($i + 2))"
+                      fi
+                      i="$(($i + 3))"
                       ;;
                     flake)
                       new_args[$i]="$arg"