diff --git a/ci-tools/update-nixpkgs b/ci-tools/update-nixpkgs
index 77d8e3bf4c6dd88950b622fed14cd2e1add95ae3..f4d9c40d0d088e48399d16f2a448990b79337092 100755
--- a/ci-tools/update-nixpkgs
+++ b/ci-tools/update-nixpkgs
@@ -41,6 +41,7 @@ export SOURCE_BRANCH="nixpkgs-upgrade-$(date +%Y-%m-%d)"
 git clone . working-copy
 cd working-copy
 git branch -D "${SOURCE_BRANCH}" || true
+git fetch origin develop
 git checkout -B "${SOURCE_BRANCH}" origin/develop
 
 echo '{}' > morph/grid/local/public-keys/users.nix