diff --git a/Makefile b/Makefile
index 7e587fb9..928876b7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 toml = $@/Cargo.toml
 bin = $@/target/debug/$@
 
+doc-crate-toml=./.imag-documentation/Cargo.toml
+
 default: all
 
 .PHONY: clean
@@ -11,6 +13,9 @@ imag-%: prep
 	cargo build --manifest-path $(toml)
 	cp $(bin) out/
 
+lib-doc:
+	cargo build --manifest-path $(doc-crate-toml)
+
 prep:
 	mkdir -p out/