diff --git a/pkgs/by-name/pe/peacock/package.nix b/pkgs/by-name/pe/peacock/package.nix
index b2ffe06fce40..e74931c727bd 100644
--- a/pkgs/by-name/pe/peacock/package.nix
+++ b/pkgs/by-name/pe/peacock/package.nix
@@ -22,6 +22,12 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-kDR2ObXzo8UudjfqU/lQl6dqblFhIEgnr20EKjiWKVw=";
   };
 
+  patches = [
+    # Remove after upstream updates to Yarn 4.14
+    # https://github.com/thepeacockproject/Peacock/blob/master/package.json#L109
+    ./yarn-4.14-support.patch
+  ];
+
   nativeBuildInputs = [
     nodejs
     yarn-berry.yarnBerryConfigHook
@@ -75,8 +81,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   missingHashes = ./missing-hashes.json;
   offlineCache = yarn-berry.fetchYarnBerryDeps {
-    inherit (finalAttrs) src missingHashes;
-    hash = "sha256-Ecpls4iGBVqSLm/4kyY0EsRa6NINodHc05DtwOfZYG4=";
+    inherit (finalAttrs) src missingHashes patches;
+    hash = "sha256-DgkmBd9/voLLxIo1R7MNknFmH62RUYrG0MeV074ZX7U=";
   };
 
   meta = {
diff --git a/pkgs/by-name/pe/peacock/yarn-4.14-support.patch b/pkgs/by-name/pe/peacock/yarn-4.14-support.patch
new file mode 100644
index 000000000000..1885f6de9f13
--- /dev/null
+++ b/pkgs/by-name/pe/peacock/yarn-4.14-support.patch
@@ -0,0 +1,23 @@
+diff --git a/.yarnrc.yml b/.yarnrc.yml
+--- a/.yarnrc.yml
++++ b/.yarnrc.yml
+@@ -14,4 +14,7 @@ plugins:
+   - path: .yarn/plugins/@yarnpkg/plugin-outdated.cjs
+     spec: "https://mskelton.dev/yarn-outdated/v2"
+ 
+-yarnPath: .yarn/releases/yarn-4.7.0.cjs
++approvedGitRepositories:
++  - "**"
++
++enableScripts: true
+diff --git a/yarn.lock b/yarn.lock
+--- a/yarn.lock
++++ b/yarn.lock
+@@ -2,6 +2,6 @@
+ # Manual changes might be lost - proceed with caution!
+ 
+ __metadata:
+-  version: 8
++  version: 9
+   cacheKey: 10
+