diff --git a/Dockerfile.build b/Dockerfile.build
index 0d7502e..0dd2075 100644
--- a/Dockerfile.build
+++ b/Dockerfile.build
@@ -1,10 +1,16 @@
 # Container just for building the code and debug
 FROM debian:testing
 
-ENV BUILD_REQ="build-essential libcurl4-gnutls-dev libcjson-dev libpcre3-dev libfcgi-dev git pkgconf libpcre2-dev"
-
 RUN apt update && apt upgrade -y
-RUN apt install -y $BUILD_REQ fcgiwrap
+RUN apt install -y \
+	build-essential \
+	libcurl4-gnutls-dev \
+	libcjson-dev \
+	libpcre3-dev \
+	libpcre2-dev \
+	libfcgi-dev \
+	git pkgconf \
+	fcgiwrap
 
 WORKDIR /usr/local/src/treebird