diff --git a/knip.config.js b/knip.config.js
index d0f9d250..30f0a654 100644
--- a/knip.config.js
+++ b/knip.config.js
@@ -5,7 +5,7 @@ const config = {
   workspaces: {
     ".": {
       ignoreBinaries: ["jq", "playwright"],
-      ignoreDependencies: [/@size-limit\/.*/, "prettier"],
+      ignoreDependencies: [/@size-limit\/.*/, "prettier", "zx"],
     },
     "packages/*": {
       entry: ["**/*.test.{ts,tsx}"],
diff --git a/package.json b/package.json
index 92da0c40..d13fd81c 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "@types/node": "^22.10.9",
     "knip": "^5.43.1",
     "size-limit": "11.1.2",
-    "typescript": "^5.7.3"
+    "typescript": "^5.7.3",
+    "zx": "^8.2.4"
   }
 }
diff --git a/packages/react-router/package.json b/packages/react-router/package.json
index 562840f5..330a6fdc 100644
--- a/packages/react-router/package.json
+++ b/packages/react-router/package.json
@@ -54,7 +54,7 @@
     "test:browser": "NODE_OPTIONS=\"${NODE_OPTIONS:-} --conditions=browser\" yarn run test:base",
     "test:rsc": "NODE_OPTIONS=\"${NODE_OPTIONS:-} --conditions=react-server\" yarn run test:base",
     "prepack": "yarn build",
-    "prepublishOnly": "wait-on ../client-react-streaming/.built --delay 3000 --timeout 60000 && && yarn pack -o attw.tgz && attw attw.tgz && rm attw.tgz && yarn run test",
+    "prepublishOnly": "wait-on ../client-react-streaming/.built --delay 3000 --timeout 60000 && yarn pack -o attw.tgz && attw attw.tgz && rm attw.tgz && yarn run test",
     "test-bundle": "yarn test-bundle:attw && yarn test-bundle:package && yarn test-bundle:publint && yarn test-bundle:shape",
     "test-bundle:attw": "attw --pack .",
     "test-bundle:package": "yarn workspace monorepo verify-package-json $PWD/package.json",
diff --git a/yarn.lock b/yarn.lock
index 64e7dd48..263f1775 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7559,6 +7559,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/fs-extra@npm:>=11":
+  version: 11.0.4
+  resolution: "@types/fs-extra@npm:11.0.4"
+  dependencies:
+    "@types/jsonfile": "npm:*"
+    "@types/node": "npm:*"
+  checksum: 10/acc4c1eb0cde7b1f23f3fe6eb080a14832d8fa9dc1761aa444c5e2f0f6b6fa657ed46ebae32fb580a6700fc921b6165ce8ac3e3ba030c3dd15f10ad4dd4cae98
+  languageName: node
+  linkType: hard
+
 "@types/http-proxy@npm:^1.17.15":
   version: 1.17.15
   resolution: "@types/http-proxy@npm:1.17.15"
@@ -7603,6 +7613,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/jsonfile@npm:*":
+  version: 6.1.4
+  resolution: "@types/jsonfile@npm:6.1.4"
+  dependencies:
+    "@types/node": "npm:*"
+  checksum: 10/309fda20eb5f1cf68f2df28931afdf189c5e7e6bec64ac783ce737bb98908d57f6f58757ad5da9be37b815645a6f914e2d4f3ac66c574b8fe1ba6616284d0e97
+  languageName: node
+  linkType: hard
+
 "@types/lodash.mergewith@npm:4.6.7":
   version: 4.6.7
   resolution: "@types/lodash.mergewith@npm:4.6.7"
@@ -7677,6 +7696,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/node@npm:>=20, @types/node@npm:^22.10.9":
+  version: 22.10.9
+  resolution: "@types/node@npm:22.10.9"
+  dependencies:
+    undici-types: "npm:~6.20.0"
+  checksum: 10/8a13d4e27e85b2e1878e2158400981feb5d5b9508cc920d475d5c327d93c7442d4baa5d2248d1503ffdd5964d955f54d4cf1009f3a3b812464e58cd6425a81cc
+  languageName: node
+  linkType: hard
+
 "@types/node@npm:^12.7.1":
   version: 12.20.55
   resolution: "@types/node@npm:12.20.55"
@@ -7693,15 +7721,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node@npm:^22.10.9":
-  version: 22.10.9
-  resolution: "@types/node@npm:22.10.9"
-  dependencies:
-    undici-types: "npm:~6.20.0"
-  checksum: 10/8a13d4e27e85b2e1878e2158400981feb5d5b9508cc920d475d5c327d93c7442d4baa5d2248d1503ffdd5964d955f54d4cf1009f3a3b812464e58cd6425a81cc
-  languageName: node
-  linkType: hard
-
 "@types/pako@npm:^2.0.0":
   version: 2.0.3
   resolution: "@types/pako@npm:2.0.3"
@@ -16109,6 +16128,7 @@ __metadata:
     semver: "npm:^7.6.0"
     size-limit: "npm:11.1.2"
     typescript: "npm:^5.7.3"
+    zx: "npm:^8.2.4"
   languageName: unknown
   linkType: soft
 
@@ -22122,3 +22142,20 @@ __metadata:
   checksum: 10/54e25956495dec22acb9399c168c6ba657ff279801a7fcd0530c414d867f1dcca279335e160af9b138dd70c332e17d548be4bc4d2f7eaf627dead50d914fec27
   languageName: node
   linkType: hard
+
+"zx@npm:^8.2.4":
+  version: 8.3.0
+  resolution: "zx@npm:8.3.0"
+  dependencies:
+    "@types/fs-extra": "npm:>=11"
+    "@types/node": "npm:>=20"
+  dependenciesMeta:
+    "@types/fs-extra":
+      optional: true
+    "@types/node":
+      optional: true
+  bin:
+    zx: build/cli.js
+  checksum: 10/1397ab20cf0043ff7a630ecedc77accbb8756f554db82dc5b32bfd0853230cae4507ab9857a4143204970e3fe56ebea2d06ee533000e0f297322b4747b3dfba7
+  languageName: node
+  linkType: hard