From 22ae0b20d009c3228d863d0c495302e64eabf8e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C2=B7=F0=90=91=91=F0=90=91=B4=F0=90=91=95=F0=90=91=91?=
 =?UTF-8?q?=F0=90=91=A9=F0=90=91=A4?= <toastal@posteo.net>
Date: Mon, 4 Aug 2025 16:55:12 +0700
Subject: [PATCH] ocamlPackages.jsont: flags to turn off optional dependencies

---
 .../ocaml-modules/jsont/default.nix           | 27 ++++++++++++-------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/pkgs/development/ocaml-modules/jsont/default.nix b/pkgs/development/ocaml-modules/jsont/default.nix
index 816d33329d09..70a88865a76d 100644
--- a/pkgs/development/ocaml-modules/jsont/default.nix
+++ b/pkgs/development/ocaml-modules/jsont/default.nix
@@ -1,9 +1,13 @@
 {
   lib,
   fetchzip,
+  topkg,
   buildTopkgPackage,
+  withBrr ? true,
   brr,
+  withBytesrw ? true,
   bytesrw,
+  withCmdliner ? true,
   cmdliner,
 }:
 
@@ -18,17 +22,22 @@ buildTopkgPackage rec {
     hash = "sha256-dXHl+bLuIrlrQ5Np37+uVuETFBb3j8XeDVEK9izoQFk=";
   };
 
-  # docs say these dependendencies are optional, but buildTopkgPackage doesn’t
-  # handle missing dependencies
+  buildInputs = lib.optional withCmdliner cmdliner;
 
-  buildInputs = [
-    cmdliner
-  ];
+  propagatedBuildInputs = lib.optional withBrr brr ++ lib.optional withBytesrw bytesrw;
 
-  propagatedBuildInputs = [
-    brr
-    bytesrw
-  ];
+  buildPhase = "${topkg.run} build ${
+    lib.escapeShellArgs [
+      "--with-brr"
+      (lib.boolToString withBrr)
+
+      "--with-bytesrw"
+      (lib.boolToString withBytesrw)
+
+      "--with-cmdliner"
+      (lib.boolToString withCmdliner)
+    ]
+  }";
 
   meta = {
     description = "Declarative JSON data manipulation";