imhex: fix build with cmake 4 (#449412)

pkgs/by-name/im/imhex/package.nix

@@ -98,8 +98,11 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "USE_SYSTEM_LLVM" true)
     (lib.cmakeBool "USE_SYSTEM_NLOHMANN_JSON" true)
     (lib.cmakeBool "USE_SYSTEM_YARA" true)
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.5")
   ];
 
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
+
   # Comment out fixup_bundle in PostprocessBundle.cmake as we are not building a standalone application
   postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cmake/modules/PostprocessBundle.cmake \
@@ -139,6 +142,7 @@ stdenv.mkDerivation (finalAttrs: {
       kashw2
       cafkafk
       govanify
+      ryand56
     ];
     platforms = with lib.platforms; linux ++ darwin;
   };