From 1789c56f430b935ac2c17153317947a7fcf4f07f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 4 Dec 2019 00:36:04 +0100
Subject: [PATCH] Fix macOS build

https://hydra.nixos.org/build/107716759
---
 src/nix/command.cc      | 3 +++
 src/nix/installables.hh | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nix/command.cc b/src/nix/command.cc
index de761166b..2da5736e7 100644
--- a/src/nix/command.cc
+++ b/src/nix/command.cc
@@ -4,6 +4,8 @@
 #include "nixexpr.hh"
 #include "profiles.hh"
 
+extern char * * environ;
+
 namespace nix {
 
 Commands * RegisterCommand::commands = nullptr;
@@ -175,6 +177,7 @@ void MixEnvironment::setEnviron() {
             auto val = getenv(var.c_str());
             if (val) stringsEnv.emplace_back(fmt("%s=%s", var.c_str(), val));
         }
+
         vectorEnv = stringsToCharPtrs(stringsEnv);
         environ = vectorEnv.data();
     } else {
diff --git a/src/nix/installables.hh b/src/nix/installables.hh
index 9388c673e..612c8ac92 100644
--- a/src/nix/installables.hh
+++ b/src/nix/installables.hh
@@ -10,7 +10,7 @@ namespace nix {
 struct Value;
 struct DrvInfo;
 class EvalState;
-class SourceExprCommand;
+struct SourceExprCommand;
 
 struct Buildable
 {