diff --git a/Makefile b/Makefile
index 1705996..df99c5c 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ build: build-src build-bin
 build-src:
 	mkdir -p $(SRC); \
   curl -sSL "https://github.com/ViViDboarder/bitwarden_rs_ldap/archive/$${BUILD_VERSION}.tar.gz" | tar xz -C $(SRC) --strip-components=1; \
-	grep -rlI 'Box<Error>' source/src/ | xargs sed -i 's/Box<Error>/Box<dyn Error>/g'
+	grep -rlI 'Box<Error>' $(SRC)/src/ | xargs sed -i 's/Box<Error>/Box<dyn Error>/g'
 
 .PHONY: build-bin
 build-bin: