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-rw-r--r--src/libstore/build.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index b3d2796d8..2e2f92fad 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -2086,6 +2086,10 @@ void DerivationGoal::initChild()
if (mount("none", (chrootRootDir + "/dev/pts").c_str(), "devpts", 0, "newinstance,mode=0620") == -1)
throw SysError("mounting /dev/pts");
createSymlink("/dev/pts/ptmx", chrootRootDir + "/dev/ptmx");
+
+ /* Make sure /dev/pts/ptmx is world-writable. With some
+ Linux versions, it is created with permissions 0. */
+ chmod_(chrootRootDir + "/dev/pts/ptmx", 0666);
}
/* Do the chroot(). Below we do a chdir() to the