Reorganize and update nixpkgs upstreams

This patch does a few things:

1. Switches from nixpkgs-unstable to nixos-unstable{,-small}, simply because
   nixpkgs-unstable is not in cache.nixos.org, but nixos-unstable is, and -small
   is the same but requires all tests to pass. So we should prefer
   nixos-unstable-small, whenever possible.

2. Reorganizes the nixpkgs import code such that Nixpkgs.nix returns an attrset
   of all the nixpkgs that I want to use, rather than putting other nixpkgs
   branches into the main one as an overlay. This is much simpler and explicit,
   but it meant I had to change a lot of usages throughtout the nix codebase.

3. As a consequence of 2, moves the overlays into separate files so they can be
   re-used across nixpkgs branches.

1 files changed, 1 insertions, 54 deletions

diff --git a/Biz/Bild/Deps.nix b/Biz/Bild/Deps.nix
index 9a18c90..8f44dde 100644
--- a/Biz/Bild/Deps.nix
+++ b/Biz/Bild/Deps.nix
@@ -1,59 +1,6 @@
 _self: super:
 
-with import ./Constants.nix;
-let
-  buildCabal = sel: name: sel.callCabal2nix name super.sources.${name} { };
-  buildCabalSubdir = sel:
-    { name, src ? super.sources.${name}, subdir ? name }:
-    sel.callCabal2nix name (src + "/${subdir}") { };
-in rec {
-  haskell = super.haskell // {
-    packages = super.haskell.packages // {
-      "${ghcCompiler}" = super.haskell.packages."${ghcCompiler}".override
-        (_old: {
-          overrides = with super.pkgs.haskell.lib;
-            sel: sup:
-            super.overridePinnedDeps (buildCabal sel) // {
-              acid-state =
-                dontCheck sup.acid-state; # mac: "too many open files"
-              clay = doJailbreak sup.clay;
-              envy = doJailbreak sup.envy;
-              fast-tags =
-                sup.fast-tags.overrideAttrs (old: old // { patches = [ ]; });
-              generic-data = dontCheck
-                sup.generic-data; # https://github.com/Lysxia/generic-data/issues/56
-              readable =
-                doJailbreak sup.readable; # why is this even being built?
-              servant-auth = doJailbreak (buildCabalSubdir sel {
-                name = "servant-auth";
-                subdir = "servant-auth/servant-auth";
-              });
-              servant-server = doJailbreak sup.servant-server;
-              stripe-core = doJailbreak sup.stripe-core;
-              stripe-haskell = dontCheck sup.stripe-haskell;
-              stripe-http-client =
-                doJailbreak (dontCheck sup.stripe-http-client);
-              temporary = dontCheck sup.temporary;
-              wai-middleware-metrics = dontCheck sup.wai-middleware-metrics;
-            };
-        });
-    };
-  };
-
-  python3 = super.python3.override {
-    packageOverrides = _: pysuper:
-      with pysuper.pkgs.python3Packages; {
-        exllama = callPackage ./Deps/exllama.nix {
-          cudaPackages = super.pkgs.cudaPackages_11_7;
-        };
-        interegular = callPackage ./Deps/interegular.nix { };
-        outlines = callPackage ./Deps/outlines.nix { };
-        perscache = callPackage ./Deps/perscache.nix { };
-      };
-  };
-
-  python3Packages = python3.pkgs;
-
+{
   autogen = super.callPackage ./Deps/autogen.nix { };
 
   guile = super.guile_3_0;