diff --git a/.drone.jsonnet b/.drone.jsonnet
index 4b304ac..bd42902 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -21,7 +21,7 @@ local PipelineLinting = {
       },
       commands: [
         'pip install -qq yapf',
-        '[ ! -z "$(find .  -type f -name *.py)" ] && yapf -rd ./',
+        '[ -z "$(find .  -type f -name *.py)" ] || (yapf -rd ./)',
       ],
     },
     {
diff --git a/.drone.yml b/.drone.yml
index 36f00c5..414ccbe 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -16,7 +16,7 @@ steps:
   image: python:3.9
   commands:
   - pip install -qq yapf
-  - "[ ! -z \"$(find .  -type f -name *.py)\" ] && yapf -rd ./"
+  - "[ -z \"$(find .  -type f -name *.py)\" ] || (yapf -rd ./)"
   environment:
     PY_COLORS: 1
 
@@ -147,6 +147,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: dc08f0c3c7eee164cd3eb5ebd46e053a0e0e042ea35746fcb4cff84e444533cf
+hmac: 42f0f2ca9afbca63325ffacc7df8e219a1f45f87075227f26f9cdf210fba4e75
 
 ...