diff --git a/Makefile b/Makefile
index 2238350de50db442c0c367eddc555de0283f4489..67b18a80ed6a288944d12df4fd49e812783ab869 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ build-dep: build-dep/opam phony
 	@# Upgrading is needed in case the pin already exists, but the builddep package changed.
 	@BUILD_DEP_PACKAGE="$$(egrep "^name:" build-dep/opam | sed 's/^name: *"\(.*\)" */\1/')"; \
 	  echo "# Pinning build-dep package." && \
-	  opam pin add "$$BUILD_DEP_PACKAGE".dev "$$(pwd)/build-dep" -k path $(OPAMFLAGS) && \
+	  opam pin add -k path $(OPAMFLAGS) "$$BUILD_DEP_PACKAGE".dev build-dep && \
 	  echo "# Updating build-dep package." && \
 	  opam upgrade "$$BUILD_DEP_PACKAGE"