chore: Remove conan patch in nix (#7534)

flake.lock

@@ -2,17 +2,18 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1780749050,
-        "narHash": "sha256-3av0pIjlOWQ6rDbNOmpUSvbNnJkGORQKKjb4LtCZsIY=",
+        "lastModified": 1781173989,
+        "narHash": "sha256-fnzKKPvS+oieI/pTzotA5tkoM47EB1NpaBcgk4R97hE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a799d3e3886da994fa307f817a6bc705ae538eeb",
+        "rev": "8c91a71d13451abc40eb9dae8910f972f979852f",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-unstable",
-        "type": "indirect"
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "nixpkgs-custom-glibc": {

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "Nix related things for xrpld";
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     # nixpkgs snapshot (2020-06-30) that shipped glibc 2.31 as the primary
     # version — matches the system libc on Ubuntu 20.04 LTS. Imported
     # manually (flake = false) because this revision predates nixpkgs'

nix/devshell.nix

@@ -1,26 +1,6 @@
 { pkgs, ... }:
 let
-  # conan is in the binary cache for Linux but not for Darwin, so on Darwin
-  # it is always built from source — and its bundled test suite is unreliable
-  # in the sandbox: `test_qbsprofile_rcflags` needs gcc (absent on Darwin, see
-  # https://github.com/NixOS/nixpkgs/pull/528995) and the patch tests are
-  # flaky from source. We only use conan as a build tool, so skip its tests on
-  # Darwin. Scoped to the dev shell (not the CI env, which builds conan on
-  # Linux from the cache). Drop once the fix reaches nixos-unstable and the
-  # lock is bumped.
-  pkgs_patched =
-    if pkgs.stdenv.isDarwin then
-      pkgs.extend (
-        final: prev: {
-          conan = prev.conan.overridePythonAttrs (_: {
-            doCheck = false;
-          });
-        }
-      )
-    else
-      pkgs;
-
-  inherit (import ./packages.nix { pkgs = pkgs_patched; }) commonPackages;
+  inherit (import ./packages.nix { inherit pkgs; }) commonPackages;
 
   # Supported compiler versions
   gccVersion = pkgs.lib.range 13 15;