nix: Remove redundant derivation attrs

These cause unnecessary rebuilds when a new series is added and
exposing them as package attributes looks convenient but is not
sustainable.

1 files changed, 8 insertions, 4 deletions

diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index ac47bc9df68..0fdcbd384b9 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -31,11 +31,12 @@ common =
   }:
   let
      sh = busybox-sandbox-shell;
-     nix = stdenv.mkDerivation rec {
-      inherit pname version src patches;
 
-      is24 = lib.versionAtLeast version "2.4pre";
-      is25 = lib.versionAtLeast version "2.5pre";
+    is24 = lib.versionAtLeast version "2.4pre";
+    is25 = lib.versionAtLeast version "2.5pre";
+
+    nix = stdenv.mkDerivation {
+      inherit pname version src patches;
 
       VERSION_SUFFIX = suffix;
 
@@ -173,6 +174,9 @@ common =
       };
 
       passthru = {
+        is24 = lib.warn ''nix package: attribute .is24 is deprecated. Please use lib.versionAtLeast X.version "2.4pre".'' is24;
+        is25 = lib.warn ''nix package: attribute .is25 is deprecated. Please use lib.versionAtLeast X.version "2.5pre".'' is25;
+
         perl-bindings = perl.pkgs.toPerlModule (stdenv.mkDerivation {
           pname = "nix-perl";
           inherit version;