Merge "Fix cloning requirements when GIT_DEPTH is set"
diff --git a/stack.sh b/stack.sh
index 0659212..c92cc79 100755
--- a/stack.sh
+++ b/stack.sh
@@ -765,7 +765,9 @@
# Bring down global requirements before any use of pip_install. This is
# necessary to ensure that the constraints file is in place before we
# attempt to apply any constraints to pip installs.
-git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH
+# We always need the master branch in addition to any stable branch, so
+# override GIT_DEPTH here.
+GIT_DEPTH=0 git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH
# Install package requirements
# Source it so the entire environment is available