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-rw-r--r--src/libstore/build.cc6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index f702433a02f2..31631ed3f356 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -2010,9 +2010,9 @@ void DerivationGoal::startBuilder()
            Samba-in-QEMU. */
         createDirs(chrootRootDir + "/etc");
 
-        writeFile(chrootRootDir + "/etc/passwd",
-            "root:x:0:0:Nix build user:/:/noshell\n"
-            "nobody:x:65534:65534:Nobody:/:/noshell\n");
+        writeFile(chrootRootDir + "/etc/passwd", fmt(
+            "root:x:0:0:Nix build user:%s:/noshell\n"
+            "nobody:x:65534:65534:Nobody:/:/noshell\n", "/tmp"));
 
         /* Declare the build user's group so that programs get a consistent
            view of the system (e.g., "id -gn"). */