diff --git a/containers/jug/dev.Dockerfile b/containers/jug/dev.Dockerfile
index 70ed47793958534527d1e4b81ec049c2571e5144..9b9c786e5b6604e0145329d432bd173eba1bd3d3 100644
--- a/containers/jug/dev.Dockerfile
+++ b/containers/jug/dev.Dockerfile
@@ -55,6 +55,7 @@ RUN declare -A target=(                                                 \
  && spack config --scope site add "config:build_jobs:${jobs}"           \
  && spack config --scope site add "config:db_lock_timeout:${jobs}0"     \
  && spack config --scope site add "config:install_tree:root:/opt/software" \
+ && spack config --scope site add "config:source_cache:/var/cache/spack" \
  && spack config blame config                                           \
  && spack compiler find --scope site                                    \
  && spack config blame compilers