diff --git a/package.json b/package.json
index aa911be..1242994 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "lint": "eslint .",
     "depcheck": "depcheck .",
     "check": "npm run lint && npm run depcheck",
-    "clean": "rimraf lib",
+    "clean": "git clean --force -X --exclude node_modules",
     "precompile": "npm run clean",
     "compile": "npm run compile-ts",
     "compile-ts": "tsc -p tsconfig.json",
diff --git a/tsconfig.json b/tsconfig.json
index 975adac..c532b9f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -9,10 +9,9 @@
     "module": "commonjs",
     "removeComments": true,
     "skipLibCheck": true,
-    "sourceMap": true,
     "strict": true,
     "target": "es2018"
   },
   "include": ["**/*"],
-  "exclude": ["./src/**/*.spec.*"]
+  "exclude": ["./src/**/*.spec.*", "./src/fixtures"]
 }