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-rw-r--r--third_party/nix/src/libstore/build.cc3
1 files changed, 0 insertions, 3 deletions
diff --git a/third_party/nix/src/libstore/build.cc b/third_party/nix/src/libstore/build.cc
index da35388d855a..74db67e862a7 100644
--- a/third_party/nix/src/libstore/build.cc
+++ b/third_party/nix/src/libstore/build.cc
@@ -2342,8 +2342,6 @@ void DerivationGoal::startBuilder() {
 
     userNamespaceSync.create();
 
-    options.allowVfork = false;
-
     Pid helper = startProcess(
         [&]() {
           /* Drop additional groups here because we can't do it
@@ -2443,7 +2441,6 @@ void DerivationGoal::startBuilder() {
 #endif
   {
   fallback:
-    options.allowVfork = !buildUser && !drv->isBuiltin();
     pid = startProcess([&]() { runChild(); }, options);
   }