diff --git a/infra/libfuzzer-pipeline.groovy b/infra/libfuzzer-pipeline.groovy
index 19f53103e..f21ab4cff 100644
--- a/infra/libfuzzer-pipeline.groovy
+++ b/infra/libfuzzer-pipeline.groovy
@@ -60,7 +60,7 @@ def call(body) {
           }
 
           if (dockerContextDir == null) {
-            dockerContextDir = new File($dockerfile).getAbsoluteFile().getParent().getName();
+            dockerContextDir = new File(dockerfile).getAbsoluteFile().getParent().getName();
           }
 
           sh "docker build -t $dockerTag -f $dockerfile $dockerContextDir"