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-rw-r--r--src/libstore/build.cc6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index e7a8ee434..246e0d9da 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1868,6 +1868,12 @@ void DerivationGoal::initChild()
private PID namespace. */
if (mount("none", (chrootRootDir + "/proc").c_str(), "proc", 0, 0) == -1)
throw SysError("mounting /proc");
+
+ /* Mount a new tmpfs on /dev/shm to ensure that whatever
+ the builder puts in /dev/shm is cleaned up automatically. */
+ if (pathExists("/dev/shm"))
+ if (mount("none", (chrootRootDir + "/dev/shm").c_str(), "tmpfs", 0, 0) == -1)
+ throw SysError("mounting /dev/shm");
/* Do the chroot(). Below we do a chdir() to the
temporary build directory to make sure the current