diff --git a/bin/get_subtree_prefixes b/bin/get_subtree_prefixes
index 7eb835f5..ac1ef1f4 100755
--- a/bin/get_subtree_prefixes
+++ b/bin/get_subtree_prefixes
@@ -7,4 +7,4 @@ function error_handler() {
 trap 'error_handler ${LINENO} $?' ERR
 set -o errtrace -o errexit -o nounset -o pipefail
 
-git log | grep git-subtree-dir | tr -d ' ' | cut -d ":" -f2 | sort | uniq | xargs -I {} bash -c 'if [ -d $(git rev-parse --show-toplevel)/{} ] ; then echo {}; fi'
+git log | grep git-subtree-dir | tr -d ' ' | cut -d ":" -f2 | sort | uniq | xargs -I {} bash -c 'if [ -d $(git rev-parse --show-toplevel)/{} ] ; then echo {}; fi' | grep -Ev '^spiffworkflow-frontend|spiffworkflow-backend$'