diff --git a/flake.nix b/flake.nix
index 757fbf6..1772e42 100644
--- a/flake.nix
+++ b/flake.nix
@@ -105,7 +105,7 @@
             git init --quiet --initial-branch=main
             git add host vfs userland extensions agents skills Cargo.toml Cargo.lock flake.nix flake.lock README.md AGENTS.md .gitignore
             # This browser fixture links to an unbuilt upstream artifact, not a WASI tool.
-            git rm userland/esbuild/source/scripts/browser/esbuild.wasm.bagel
+            git rm --cached userland/esbuild/source/scripts/browser/esbuild.wasm.bagel
             git commit --no-gpg-sign --quiet -m 'Bundle source ${revision}'
             cp -r ${brushSource} userland/brush/source
             chmod -R u+w userland/brush/source