diff --git a/Dockerfile b/Dockerfile
index 9baa53d..1d986cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ARG REGISTRY=ghcr.io/epics-containers
 FROM  ${REGISTRY}/epics-base-${TARGET_ARCHITECTURE}-developer:${BASE} AS developer
 
 # Get latest ibek while in development. Will come from epics-base in future.
-RUN pip install --upgrade ibek
+RUN pip install --upgrade ibek==1.4.0
 
 # The devcontainer mounts the project root to /epics/ioc-adsimdetector. Using
 # the same location here makes devcontainer/runtime differences transparent.
@@ -35,7 +35,7 @@ COPY ibek-support/ADSimDetector/ ADSimDetector/
 RUN ADSimDetector/install.sh R2-10
 
 # Generate template IOC source tree / generate Makefile / compile
-RUN ibek ioc compile
+RUN ibek ioc build
 
 ##### runtime preparation stage ################################################