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-rw-r--r--nix/libstore/build.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc
index f9fd61adde..f0f60d7df1 100644
--- a/nix/libstore/build.cc
+++ b/nix/libstore/build.cc
@@ -1717,7 +1717,7 @@ void DerivationGoal::startBuilder()
/* In a sandbox, for determinism, always use the same temporary
directory. */
- tmpDirInSandbox = useChroot ? "/tmp/guix-build-" + drvName + "-0" : tmpDir;
+ tmpDirInSandbox = useChroot ? canonPath("/tmp/guix-build-", true) + drvName + "-0" : tmpDir;
/* For convenience, set an environment pointing to the top build
directory. */