diff --git a/antelope.test.ts b/antelope.test.ts
index c2578ca..92ace3d 100644
--- a/antelope.test.ts
+++ b/antelope.test.ts
@@ -7,7 +7,7 @@ export default defineConfig({
       source: {
         type: "local",
         path: ".",
-        installCommand: ["npx tsc --skipLibCheck"],
+        installCommand: ["node node_modules/typescript/bin/tsc --skipLibCheck"],
       },
     },
   },
diff --git a/playground/antelope.config.ts b/playground/antelope.config.ts
index d8b0eb4..8a864f0 100644
--- a/playground/antelope.config.ts
+++ b/playground/antelope.config.ts
@@ -8,8 +8,8 @@ export default defineConfig({
         type: "local",
         path: ".",
         watchDir: ["src"],
-        installCommand: ["npx tsc"],
-        reloadCommand: ["npx tsc"],
+        installCommand: ["node node_modules/typescript/bin/tsc"],
+        reloadCommand: ["node node_modules/typescript/bin/tsc"],
       },
     },
     "antelopejs-module": {
@@ -17,8 +17,8 @@ export default defineConfig({
         type: "local",
         path: "..",
         watchDir: ["src"],
-        installCommand: ["npx tsc"],
-        reloadCommand: ["npx tsc"],
+        installCommand: ["node node_modules/typescript/bin/tsc"],
+        reloadCommand: ["node node_modules/typescript/bin/tsc"],
       },
     },
   },