diff --git a/pkgs/by-name/vi/vikunja/package.nix b/pkgs/by-name/vi/vikunja/package.nix
index 0f1bbf22d5f6..5d0aa4dcef05 100644
--- a/pkgs/by-name/vi/vikunja/package.nix
+++ b/pkgs/by-name/vi/vikunja/package.nix
@@ -47,6 +47,11 @@ let
       pnpm_10
     ];
 
+    postPatch = ''
+      substituteInPlace src/version.json \
+        --replace-fail '"dev"' '"${finalAttrs.version}"'
+    '';
+
     doCheck = true;
 
     postBuild = ''