diff --git a/justfile b/justfile
index 61855a9..9b39145 100644
--- a/justfile
+++ b/justfile
@@ -1,5 +1,6 @@
 export RUSTFLAGS := "-C target-cpu=native"
 export WEBKIT_DISABLE_COMPOSITING_MODE := "1"
+export DOCKER_CONFIG := env_var_or_default("DOCKER_CONFIG", ".lanspread-peer-cli/docker-config")
 
 build:
   cargo tauri build --no-bundle -- --profile dev
@@ -29,6 +30,7 @@ peer-cli-build:
   cargo build -p lanspread-peer-cli
 
 peer-cli-image:
+  mkdir -p "$DOCKER_CONFIG"
   docker build -f crates/lanspread-peer-cli/Dockerfile -t lanspread-peer-cli:dev .
 
 # macvlan: each peer container gets its own MAC/IP on the real LAN.
@@ -40,6 +42,7 @@ LANSPREAD_SUBNET := "192.168.1.0/24"
 LANSPREAD_GATEWAY := "192.168.1.1"
 
 peer-cli-net:
+  mkdir -p "$DOCKER_CONFIG"
   docker network inspect {{LANSPREAD_NET}} >/dev/null 2>&1 || \
     docker network create -d macvlan \
       --subnet={{LANSPREAD_SUBNET}} \