diff --git a/Dockerfile b/Dockerfile
index 5aff7ce..400cbb2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,8 @@
 FROM debian:latest
 
+# Used in the makefile
+ENV CHORDPRO_PIPELINE true
+
 ARG ZOLA_VERSION="0.18.0"
 ARG CHORDPRO_VERSION="6.050"