From 3cc1125595d97b4ab7369e37e4ad22f4cfecb8b2 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Mon, 17 Jun 2019 08:08:04 +0200
Subject: [PATCH] Another attempt at getting pseudoterminals to work on macOS

---
 src/libstore/build.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index cccf0c7c6..5b38bcf3c 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -2196,6 +2196,9 @@ void DerivationGoal::startBuilder()
 
         if (chown(slaveName.c_str(), buildUser->getUID(), 0))
             throw SysError("changing owner of pseudoterminal slave");
+    } else {
+        if (grantpt(builderOut.readSide.get()))
+            throw SysError("granting access to pseudoterminal slave");
     }
 
     #if 0