Use experimental versions in package.json

These get overridden anyway.

fixtures/flight-parcel/package.json

@@ -36,9 +36,9 @@
     "express": "^4.18.2",
     "parcel": "2.0.0-dev.1787",
     "process": "^0.11.10",
-    "react": "^19",
-    "react-dom": "^19",
-    "react-server-dom-parcel": "^0.0.1",
+    "react": "experimental",
+    "react-dom": "experimental",
+    "react-server-dom-parcel": "experimental",
     "rsc-html-stream": "^0.0.4",
     "ws": "^8.8.1"
   },

fixtures/flight-parcel/yarn.lock

@@ -1936,12 +1936,12 @@ [email protected]:
     iconv-lite "0.4.24"
     unpipe "1.0.0"
 
-react-dom@^19:
-  version "19.0.0"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-19.0.0.tgz#43446f1f01c65a4cd7f7588083e686a6726cfb57"
-  integrity sha512-4GV5sHFG0e/0AD4X+ySy6UJd3jVl1iNsNHdpad0qhABJ11twS3TTBnseqsKurKcsNqCEFeGL3uLpVChpIO3QfQ==
+react-dom@experimental:
+  version "0.0.0-experimental-79ddf5b5-20241210"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-0.0.0-experimental-79ddf5b5-20241210.tgz#c140f191e7a88be5d4c38d34f7cf1dbf38a9a71d"
+  integrity sha512-bAB3yL0kntJWIC01+WprH/XAp7KATXSZ0kc6lUN9A1jMMDYTDOBmN0ghCMnDe/5lalJJouqGAmRd5bkji9HqwQ==
   dependencies:
-    scheduler "^0.25.0"
+    scheduler "0.0.0-experimental-79ddf5b5-20241210"
 
 [email protected]:
   version "6.0.9"
@@ -1953,15 +1953,15 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/react-refresh/-/react-refresh-0.14.2.tgz#3833da01ce32da470f1f936b9d477da5c7028bf9"
   integrity sha512-jCvmsr+1IUSMUyzOkRcvnVbX3ZYC6g9TDrDbFuFmRDq7PD4yaGbLKNQL6k2jnArV8hjYxh7hVhAZB6s9HDGpZA==
 
-react-server-dom-parcel@^0.0.1:
+react-server-dom-parcel@experimental:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/react-server-dom-parcel/-/react-server-dom-parcel-0.0.1.tgz#2653c2b39a857fbd17770d27d6f08bd139803f09"
   integrity sha512-f93wv8gycm4ltcQRqpSlgYyT6cJxmjJdRmXw3deQoXowDlP44W4RRzwHQ70u1xseCpHFIORmuHVXk7+Fk8RFtQ==
 
-react@^19:
-  version "19.0.0"
-  resolved "https://registry.yarnpkg.com/react/-/react-19.0.0.tgz#6e1969251b9f108870aa4bff37a0ce9ddfaaabdd"
-  integrity sha512-V8AVnmPIICiWpGfm6GLzCR/W5FXLchHop40W4nXBmdlEceh16rCN8O8LNWm5bh5XUX91fh7KpA+W0TgMKmgTpQ==
+react@experimental:
+  version "0.0.0-experimental-79ddf5b5-20241210"
+  resolved "https://registry.yarnpkg.com/react/-/react-0.0.0-experimental-79ddf5b5-20241210.tgz#d1c620a36dfa02337f69c4eaeee230fec6742b72"
+  integrity sha512-+e7TiHmfdCEzR942m4ukOBf/4jd41Mc8M/ExOGYT7LtbrXCX/HCw9RqffaYZXdMd3+QD/nBzx9f/DTDLzP8FLA==
 
 regenerator-runtime@^0.14.1:
   version "0.14.1"
@@ -1988,10 +1988,10 @@ [email protected], safe-buffer@^5.0.1:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
-scheduler@^0.25.0:
-  version "0.25.0"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.25.0.tgz#336cd9768e8cceebf52d3c80e3dcf5de23e7e015"
-  integrity sha512-xFVuu11jh+xcO7JOAGJNOXld8/TcEHK/4CituBUeUb5hqxJLj9YuemAEuvm9gQ/+pgXYfbQuqAkiYu+u7YEsNA==
+scheduler@0.0.0-experimental-79ddf5b5-20241210:
+  version "0.0.0-experimental-79ddf5b5-20241210"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.0.0-experimental-79ddf5b5-20241210.tgz#2b6c17201831aa8f8e35e65ad95c7cf5362b5454"
+  integrity sha512-Rg1aDzPQWVLENsVBlZbIS1buG55XTCEN7tOz0qk+pCnhswwa7h0VzGFVmX8CLuWnTYQYWw9ldFrjKLDM1Q1k3g==
 
 semver@^7.5.2:
   version "7.6.3"