diff --git a/src/libstore/unix/build/sandbox-network.sb b/src/libstore/unix/build/sandbox-network.sb
index 335edbaed..a504027c7 100644
--- a/src/libstore/unix/build/sandbox-network.sb
+++ b/src/libstore/unix/build/sandbox-network.sb
@@ -16,6 +16,7 @@ R""(
 
 ; Allow DNS lookups.
 (allow network-outbound (remote unix-socket (path-literal "/private/var/run/mDNSResponder")))
+(allow mach-lookup (global-name "com.apple.SystemConfiguration.DNSConfiguration"))
 
 ; Allow access to trustd.
 (allow mach-lookup (global-name "com.apple.trustd"))