diff --git a/.env.sample b/.env.sample
index ca9f479..0f41533 100644
--- a/.env.sample
+++ b/.env.sample
@@ -7,13 +7,16 @@ LETS_ENCRYPT_ENV=production
 
 COMPOSE_FILE="compose.yml"
 
+# Change to an absolute path to use a bind-mount, e.g. /opt/fedwiki
+FEDWIKI_VOLUME="fedwiki"
+
 # custom wiki.cafe image, for working oauth2 support
 #COMPOSE_FILE="$COMPOSE_FILE:compose.wikicafe.yml"
 
 # Predefined "owner" security
 #COMPOSE_FILE="$COMPOSE_FILE:compose.owner.yml"
 
-# Persistent "lib" volume
+# persistent lib volume / node_modules directory, e.g. for plugmatic
 #COMPOSE_FILE="$COMPOSE_FILE:compose.lib.yml"
 
 COOKIE_SECRET="asflkjqpweoriuwpeogdjgbpdofigh"
diff --git a/compose.yml b/compose.yml
index 4a46f40..e72d6c6 100644
--- a/compose.yml
+++ b/compose.yml
@@ -7,7 +7,7 @@ services:
     command: /bin/sh config/install.sh
     volumes:
       - "fedwiki_friends:/home/node/config"
-      - "fedwiki:/home/node/.wiki"
+      - "${FEDWIKI_VOLUME}:/home/node/.wiki"
     networks:
       - proxy
     configs: