diff --git a/devShell.nix b/devShell.nix
index 7b8a108..a58c8fa 100644
--- a/devShell.nix
+++ b/devShell.nix
@@ -8,7 +8,7 @@ let
     image=$2
     nix build --out-link "./env/$env/image" .#$image
     # add image to cache
-    git update-index --assume-unchanged env/$env/image
+    git add -Nf env/$env/image
   '';
   build-qcow = writeScriptBin "build-qcow" ''
     build local qcow
diff --git a/env/gcp/image b/env/gcp/image
deleted file mode 120000
index edf545f..0000000
--- a/env/gcp/image
+++ /dev/null
@@ -1 +0,0 @@
-/nix/store/broken-link
\ No newline at end of file
diff --git a/env/local/image b/env/local/image
deleted file mode 120000
index edf545f..0000000
--- a/env/local/image
+++ /dev/null
@@ -1 +0,0 @@
-/nix/store/broken-link
\ No newline at end of file
diff --git a/scripts/terranix-apply.sh b/scripts/terranix-apply.sh
index 0f9e573..41bf58f 100755
--- a/scripts/terranix-apply.sh
+++ b/scripts/terranix-apply.sh
@@ -12,4 +12,4 @@ cp $configFile $chdir/config.tf.json &&
     terraform -chdir=$chdir init &&
     terraform -chdir=$chdir apply &&
     terraform -chdir=$chdir output -json >$chdir/output.json &&
-    git update-index --assume-unchanged $chdir/output.json
+    git add -Nf $chdir/output.json