From 4e1ebe4f37358a6b7fd01fea457c509fc3b4948a Mon Sep 17 00:00:00 2001
From: Mario Rodas <marsam@users.noreply.github.com>
Date: Sat, 18 Jun 2022 04:20:00 +0000
Subject: [PATCH] cmdstan: fix build on darwin

---
 pkgs/development/compilers/cmdstan/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/cmdstan/default.nix b/pkgs/development/compilers/cmdstan/default.nix
index 45ab576878cf..7070d3d5394b 100644
--- a/pkgs/development/compilers/cmdstan/default.nix
+++ b/pkgs/development/compilers/cmdstan/default.nix
@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
   doCheck = true;
   checkInputs = [ python3 ];
 
+  CXXFLAGS = lib.optionalString stdenv.isDarwin "-D_BOOST_LGAMMA";
+
   postPatch = ''
     substituteInPlace stan/lib/stan_math/make/libraries \
       --replace "/usr/bin/env bash" "bash"
@@ -42,7 +44,7 @@ stdenv.mkDerivation rec {
   preFixup = "rm -rf $(pwd)";
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = stdenv.isLinux && stdenv.isAarch64;
     description = "Command-line interface to Stan";
     longDescription = ''
       Stan is a probabilistic programming language implementing full Bayesian