diff --git a/Makefile b/Makefile
index 8f6d462fa6a51fdf81da416dae3f1807c54019c5..068f872f4466fcf2cf7cacddb0a6dc17c0e22241 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-COMMIT := $(shell git rev-parse --short HEAD)
-LDFLAGS := "-X 'git.gabrielgio.me/cerrado/templates.Slug=.$(COMMIT)' -s -w"
+SLUG ?= $(shell git rev-parse --short HEAD)
+LDFLAGS := "-X 'git.gabrielgio.me/cerrado/templates.Slug=.$(SLUG)' -s -w"
 
 build: sass-slug tmpl
 	go build \
@@ -17,7 +17,7 @@ sass-slug:
 	mkdir -p static
 	sassc \
 		--style compressed \
-		-I scss scss/main.scss static/main.$(COMMIT).css
+		-I scss scss/main.scss static/main.$(SLUG).css
 
 sass:
 	mkdir -p static