diff --git a/pkgs/by-name/cg/cgt-calc/package.nix b/pkgs/by-name/cg/cgt-calc/package.nix
index 700ead59662e..482be86743b2 100644
--- a/pkgs/by-name/cg/cgt-calc/package.nix
+++ b/pkgs/by-name/cg/cgt-calc/package.nix
@@ -1,6 +1,7 @@
 {
   lib,
   fetchFromGitHub,
+  fetchpatch,
   python3Packages,
   withTeXLive ? true,
   texliveSmall,
@@ -17,6 +18,15 @@ python3Packages.buildPythonApplication (finalAttrs: {
     hash = "sha256-KPzADW+n82X08IMfSIl5JyYPm8fxbbowud8sBdUxRgA=";
   };
 
+  patches = [
+    (fetchpatch {
+      # https://github.com/KapJI/capital-gains-calculator/pull/781
+      name = "update uv-build requirement.patch";
+      url = "https://github.com/KapJI/capital-gains-calculator/commit/0222eafdcf1911f3e2fd781697dc53311f529f62.patch";
+      hash = "sha256-L8jgrdA9t3x8mdaLmAuW6vFhHCLGA+0gQ/8j9EcYKhE=";
+    })
+  ];
+
   build-system = with python3Packages; [
     uv-build
   ];