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-rw-r--r--default.nix8
-rw-r--r--pkgs/stdenv/generic/default.nix6
2 files changed, 7 insertions, 7 deletions
diff --git a/default.nix b/default.nix
index 9d5764a6307f..c1b9bfd39f92 100644
--- a/default.nix
+++ b/default.nix
@@ -1 +1,7 @@
-import ./pkgs/top-level/all-packages.nix
+if ! builtins ? nixVersion || builtins.compareVersions "1.6" builtins.nixVersion == 1 then
+
+  abort "This version of Nixpkgs requires Nix >= 1.6, please upgrade!"
+
+else
+
+  import ./pkgs/top-level/all-packages.nix
diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index 6e74af5fce52..f1cf34b160c6 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -12,12 +12,6 @@ let lib = import ../../../lib; in lib.makeOverridable (
 , extraBuildInputs ? []
 }:
 
-if ! builtins ? langVersion then
-
-  abort "This version of Nixpkgs requires Nix >= 1.2, please upgrade!"
-
-else
-
 let
 
   allowUnfree = config.allowUnfree or true && builtins.getEnv "HYDRA_DISALLOW_UNFREE" != "1";