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-rw-r--r--src/libstore/build.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index e068ab0bdd94..a482ace00c22 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1545,6 +1545,9 @@ void DerivationGoal::startBuilder()
 
     if (fixedOutput) useChroot = false;
 
+    /* Hack to allow derivations to disable chroot builds. */
+    if (drv.env["__noChroot"] == "1") useChroot = false;
+
     if (useChroot) {
 #if CHROOT_ENABLED
         /* Create a temporary directory in which we set up the chroot