diff --git a/build-docker b/build-docker
index abb882b..17b267e 100755
--- a/build-docker
+++ b/build-docker
@@ -8,5 +8,6 @@ set -e
 
 IMAGE_NAME=${1:-"purr"}
 
+stack setup
 stack build --copy-bins
 docker build . -t $IMAGE_NAME