diff --git a/Containers/imaginary/Dockerfile b/Containers/imaginary/Dockerfile
index d0cd9020..9bd0e300 100644
--- a/Containers/imaginary/Dockerfile
+++ b/Containers/imaginary/Dockerfile
@@ -1,11 +1,13 @@
 FROM golang:1.20.3-alpine3.17 as go
-RUN apk add --no-cache \
+RUN set -ex; \
+    apk add --no-cache \
         vips-dev \
         build-base; \
     go install github.com/h2non/imaginary@b632dae8cc321452c3f85bcae79c580b1ae1ed84
 
 FROM alpine:3.17.3
-RUN apk add --no-cache \
+RUN set -ex; \
+    apk add --no-cache \
         tzdata \
         ca-certificates \
         netcat-openbsd \