diff --git a/ci-tools/update-nixpkgs b/ci-tools/update-nixpkgs
index 4c7d165034f167cf6efc9cba1180748991ce8022..911848ec3e1f64d83e69fc412dd01364260ce5b4 100755
--- a/ci-tools/update-nixpkgs
+++ b/ci-tools/update-nixpkgs
@@ -6,7 +6,7 @@ set -eux -o pipefail
 TARGET_BRANCH="nixpkgs-upgrade-$(date +%Y-%m-%d)"
 
 echo '{}' > morph/grid/local/public-keys/users.nix
-nix-build -A morph -o result-before
+# nix-build -A morph -o result-before
 
 git checkout "${TARGET_BRANCH}" || git checkout -b "${TARGET_BRANCH}"
 
@@ -14,7 +14,7 @@ git checkout "${TARGET_BRANCH}" || git checkout -b "${TARGET_BRANCH}"
 # sort out this mess sooner rather than later...
 nix-shell ./shell.nix --run update-nixpkgs
 
-nix-build -A morph -o result-after
+# nix-build -A morph -o result-after
 diff=$(nix --extra-experimental-features nix-command store diff-closures ./result-before/ ./result-after/)
 
 git commit -am "bump nixpkgs version"