diff --git a/Dockerfile.devel b/Dockerfile.devel
index 7f606fc..f690690 100644
--- a/Dockerfile.devel
+++ b/Dockerfile.devel
@@ -69,7 +69,6 @@ USER $USERNAME
 
 # Configure environment variables
 ENV DISPLAY=:0
-ENV ZEPHYR_BASE=/workdir/zephyr
 
 # Set working directory
 WORKDIR /workdir