diff --git a/pkgs/build-support/vm/windows/cygwin-iso/default.nix b/pkgs/build-support/vm/windows/cygwin-iso/default.nix
index d9801428a887..b560a850a306 100644
--- a/pkgs/build-support/vm/windows/cygwin-iso/default.nix
+++ b/pkgs/build-support/vm/windows/cygwin-iso/default.nix
@@ -40,7 +40,7 @@ let
     };
   in map gen expr;
 
-in import <nixpkgs/nixos/lib/make-iso9660-image.nix> {
+in import ../../../../../nixos/lib/make-iso9660-image.nix {
   inherit stdenv perl cdrkit pathsFromGraph;
   contents = [
     { source = "${cygwinCross}/bin/setup.exe";
diff --git a/pkgs/games/minecraft-server/default.nix b/pkgs/games/minecraft-server/default.nix
index 12497579bdce..3bbfdedd7467 100644
--- a/pkgs/games/minecraft-server/default.nix
+++ b/pkgs/games/minecraft-server/default.nix
@@ -1,7 +1,5 @@
 { stdenv, fetchurl, jre }:
 
-with import <nixpkgs> {};
-
 stdenv.mkDerivation rec {
   name    = "minecraft-server-${version}";
   version = "1.7.10";
diff --git a/pkgs/tools/networking/airfield/default.nix b/pkgs/tools/networking/airfield/default.nix
index 33b0baf20a9f..35dc507206dd 100644
--- a/pkgs/tools/networking/airfield/default.nix
+++ b/pkgs/tools/networking/airfield/default.nix
@@ -3,7 +3,7 @@
 with stdenv.lib;
 
 let 
-  nodePackages = callPackage (import <nixpkgs/pkgs/top-level/node-packages.nix>) {
+  nodePackages = callPackage (import ../../../top-level/node-packages.nix) {
     neededNatives = [python] ++ optional (stdenv.isLinux) utillinux;
     self = nodePackages;
     generated = ./package.nix;