diff --git a/Dockerfile b/Dockerfile
index 157a94c..a161688 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,10 +12,10 @@ MAINTAINER Andrey Arapov <andrey.arapov@nixaid.com>
 ENV DEBIAN_FRONTEND noninteractive
 
 # Define a user under which the pulseaudio server will be running
-ENV USER pulseaudio
-ENV UID 1000
-ENV GROUPS audio
-ENV HOME /home/$USER
+ENV USER=user \
+    UID=1000 \
+    GROUPS=audio \
+    HOME=/home/user
 
 RUN apt-get update \
     && apt-get install -yq pulseaudio pulseaudio-module-x11 \