json2ts: fix build on darwin; allow case insensitive import

pkgs/by-name/js/json2ts/package.nix

@@ -2,6 +2,7 @@
   buildNpmPackage,
   fetchFromGitHub,
   lib,
+  jq,
 }:
 buildNpmPackage {
   name = "json2ts";
@@ -12,8 +13,17 @@ buildNpmPackage {
     rev = "118d6a8e7a5a9397d1d390ce297f127ae674a623";
     hash = "sha256-ldAFfw3E0A0lIJyDSsshgPRPR7OmV/FncPsDhC3waT8=";
   };
+
+  nativeBuildInputs = [ jq ];
   npmDepsHash = "sha256-kLKau4SBxI9bMAd7X8/FQfCza2sYl/+0bg2LQcOQIJo=";
 
+  # forceConsistentCasingInFileNames: false is needed for typescript on darwin
+  # https://www.typescriptlang.org/tsconfig/#forceConsistentCasingInFileNames
+  postConfigure = ''
+    jq '.compilerOptions.forceConsistentCasingInFileNames = false' tsconfig.json > temp.json
+    mv temp.json tsconfig.json
+  '';
+
   meta = with lib; {
     mainProgram = "json2ts";
     description = "Compile JSON Schema to TypeScript type declarations";