treewide: get rid of platforms.allBut

Negative reasoning like `allBut` is a bad idea with an open world of
platforms. Concretely, if we add a new, quite different sort of
platform, existing packages with `allBut` will claim they work on it
even though they probably won't.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/systems/doubles.nix b/lib/systems/doubles.nix
index 20294a28a110..0e1ee62ac950 100644
--- a/lib/systems/doubles.nix
+++ b/lib/systems/doubles.nix
@@ -24,10 +24,11 @@ let
 in rec {
   inherit all;
 
-  allBut = platforms: lists.filter (x: !(builtins.elem x platforms)) all;
   none = [];
 
   arm     = filterDoubles predicates.isArm;
+  aarch64 = filterDoubles predicates.isAarch64;
+  x86     = filterDoubles predicates.isx86;
   i686    = filterDoubles predicates.isi686;
   mips    = filterDoubles predicates.isMips;
   x86_64  = filterDoubles predicates.isx86_64;