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-rw-r--r--nixos/modules/services/misc/nix-daemon.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/nixos/modules/services/misc/nix-daemon.nix b/nixos/modules/services/misc/nix-daemon.nix
index e2bbd4b01aa1..7101cadfeed2 100644
--- a/nixos/modules/services/misc/nix-daemon.nix
+++ b/nixos/modules/services/misc/nix-daemon.nix
@@ -105,7 +105,9 @@ in
           If set, Nix will perform builds in a sandboxed environment that it
           will set up automatically for each build.  This prevents
           impurities in builds by disallowing access to dependencies
-          outside of the Nix store.
+          outside of the Nix store. This isn't enabled by default for
+          performance. It doesn't affect derivation hashes, so changing
+          this option will not trigger a rebuild of packages.
         ";
       };