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-rw-r--r--pkgs/servers/dns/knot-dns/default.nix12
1 files changed, 4 insertions, 8 deletions
diff --git a/pkgs/servers/dns/knot-dns/default.nix b/pkgs/servers/dns/knot-dns/default.nix
index fb4efba383c..3e3bcaf1e00 100644
--- a/pkgs/servers/dns/knot-dns/default.nix
+++ b/pkgs/servers/dns/knot-dns/default.nix
@@ -3,8 +3,6 @@
 , autoreconfHook, nixosTests
 }:
 
-let inherit (lib) optional optionals; in
-
 stdenv.mkDerivation rec {
   pname = "knot-dns";
   version = "3.1.0";
@@ -39,12 +37,10 @@ stdenv.mkDerivation rec {
     libmnl # required for knot >= 3.1
     # without sphinx &al. for developer documentation
     # TODO: add dnstap support?
-  ]
-    ++ optionals stdenv.isLinux [
-      libcap_ng systemd
-      libbpf # XDP support
-    ]
-    ++ optional stdenv.isDarwin zlib; # perhaps due to gnutls
+  ] ++ lib.optionals stdenv.isLinux [
+    libcap_ng systemd
+    libbpf # XDP support
+  ] ++ lib.optional stdenv.isDarwin zlib; # perhaps due to gnutls
 
   enableParallelBuilding = true;