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-rw-r--r--src/libstore/build.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 54890afd180c..f015b878c3ee 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1678,6 +1678,7 @@ void DerivationGoal::startBuilder()
            to ensure that we can create hard-links to non-directory
            inputs in the fake Nix store in the chroot (see below). */
         chrootRootDir = drvPath + ".chroot";
+        if (pathExists(chrootRootDir)) deletePath(chrootRootDir);
 
         /* Clean up the chroot directory automatically. */
         autoDelChroot = boost::shared_ptr<AutoDelete>(new AutoDelete(chrootRootDir));