diff --git a/Makefile b/Makefile
index 12066646..8d3071ba 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 export PATH := $(PATH):$(shell go env GOPATH)/bin
 
 scalibr: protos
+	# CGO is required for certain dependencies such as
+	# go-sqlite3 used by the RPM extractor.
 	CGO_ENABLED=1 go build binary/scalibr.go
 
 test: protos