diff --git a/pkgs/by-name/nu/nunicode/package.nix b/pkgs/by-name/nu/nunicode/package.nix
index 0025372fb2eb..e8afc6c0b768 100644
--- a/pkgs/by-name/nu/nunicode/package.nix
+++ b/pkgs/by-name/nu/nunicode/package.nix
@@ -45,6 +45,11 @@ stdenv.mkDerivation (finalAttrs: {
   # avoid name-clash on case-insensitive filesystems
   cmakeBuildDir = "build-dir";
 
+  cmakeFlags = [
+    # fix compatibility with CMake (https://cmake.org/cmake/help/latest/command/cmake_minimum_required.html)
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "4.0")
+  ];
+
   doCheck = true;
 
   checkPhase = ''