diff --git a/build/docker-compose.yml b/build/docker-compose.yml
index a4511ea..da11932 100644
--- a/build/docker-compose.yml
+++ b/build/docker-compose.yml
@@ -9,7 +9,8 @@ services:
       # to the IP address where your ACME client's solver is listening.
       # FAKE_DNS: 172.17.0.1
       FAKE_DNS: 10.77.77.77
-      BOULDER_CONFIG_DIR: &boulder_config_dir labca/config
+      BOULDER_CONFIG_DIR: labca/config
+      GOCACHE: /boulder/.gocache/go-build
       GOFLAGS: -mod=vendor
       # Forward the parent env's GOEXPERIMENT value into the container.
       GOEXPERIMENT: ${GOEXPERIMENT:-}