diff --git a/infra/libfuzzer-pipeline.groovy b/infra/libfuzzer-pipeline.groovy
index 05161ed07..f740a1ac4 100644
--- a/infra/libfuzzer-pipeline.groovy
+++ b/infra/libfuzzer-pipeline.groovy
@@ -42,7 +42,7 @@ def call(body) {
       echo "Building $dockerTag"
 
       // rm files with docker first to use the same user
-      sh "docker run --rm -v $workspace/out:/out ubuntu rm -rf /out/*"
+      sh "docker run --rm -v $workspace/out:/out ubuntu /bin/sh -c 'ls -al /out/ && rm -rf /out/* && ls -al /out/'"
       sh "rm -rf $workspace/out"
       sh "mkdir -p $workspace/out"