diff --git a/.azure-pipelines/docker-sonic-slave.yml b/.azure-pipelines/docker-sonic-slave.yml
index 6b4fcafda9..c8209c5163 100644
--- a/.azure-pipelines/docker-sonic-slave.yml
+++ b/.azure-pipelines/docker-sonic-slave.yml
@@ -21,6 +21,7 @@ pr:
     - sonic-slave-jessie
     - sonic-slave-stretch
     - sonic-slave-buster
+    - src/sonic-build-hooks
 
 parameters:
 - name: 'arches'
diff --git a/src/sonic-build-hooks/scripts/buildinfo_base.sh b/src/sonic-build-hooks/scripts/buildinfo_base.sh
index d20d685815..f156930bf0 100755
--- a/src/sonic-build-hooks/scripts/buildinfo_base.sh
+++ b/src/sonic-build-hooks/scripts/buildinfo_base.sh
@@ -70,7 +70,7 @@ set_reproducible_mirrors()
         expression="s/^deb.*$REPR_MIRROR_URL_PATTERN/#\0/"
     fi
 
-    local mirrors="/etc/apt/sources.list $(ls /etc/apt/sources.list.d/)"
+    local mirrors="/etc/apt/sources.list $(find /etc/apt/sources.list.d/ -type f)"
     for mirror in $mirrors; do
         sed -i "$expression" "$mirror"
     done