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-rw-r--r--src/libstore/build.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index d05ff75064fe..61abd2ed216f 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -1661,7 +1661,7 @@ void DerivationGoal::startBuilder()
 
     /* Create a temporary directory where the build will take
        place. */
-    tmpDir = createTempDir("", "nix-build-" + baseNameOf(drvPath), false, false, 0700);
+    tmpDir = createTempDir("", "nix-build-" + storePathToName(drvPath), false, false, 0700);
 
     /* For convenience, set an environment pointing to the top build
        directory. */