From 1bee13eff3a1dd93e2ec51d7efc2259086b839d3 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Sun, 16 Aug 2020 23:34:37 +0100
Subject: [PATCH] jxrlib: fix/enable for darwin

---
 pkgs/development/libraries/jxrlib/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/jxrlib/default.nix b/pkgs/development/libraries/jxrlib/default.nix
index e119c75ff8d..f0f5b9d7793 100644
--- a/pkgs/development/libraries/jxrlib/default.nix
+++ b/pkgs/development/libraries/jxrlib/default.nix
@@ -13,6 +13,12 @@ stdenv.mkDerivation rec {
     sha256 = "0rk3hbh00nw0wgbfbqk1szrlfg3yq7w6ar16napww3nrlm9cj65w";
   };
 
+  postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
+    substituteInPlace Makefile \
+      --replace '-shared' '-dynamiclib -undefined dynamic_lookup' \
+      --replace '.so' '.dylib'
+  '';
+
   nativeBuildInputs = [ python ];
 
   makeFlags = [ "DIR_INSTALL=$(out)" "SHARED=1" ];
@@ -21,7 +27,7 @@ stdenv.mkDerivation rec {
     description = "Implementation of the JPEG XR image codec standard";
     homepage = "https://jxrlib.codeplex.com";
     license = licenses.bsd2;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     maintainers = with maintainers; [ romildo ];
   };
 }