diff --git a/src/platform.js b/src/platform.js
index 10db03fac..1a184313a 100644
--- a/src/platform.js
+++ b/src/platform.js
@@ -69,7 +69,7 @@ async function pruneInfraImages() {
             const imageIdToPrune = tag === '<none>' ? `${repo}@${digest}` : `${repo}:${tag}`; // untagged, use digest
             console.log(`pruneInfraImages: removing unused image of ${imageName}: ${imageIdToPrune}`);
 
-            const [error] = await safe(shell.exec('pruneInfraImages', `docker rmi '${imageIdToPrune}'`, {}));
+            const [error] = await safe(shell.execArgs('pruneInfraImages', 'docker', [ 'rmi', imageIdToPrune ], {}));
             if (error) console.log(`Error removing image ${imageIdToPrune}: ${error.mesage}`);
         }
     }