nixpkgs.overlays and nixpkgs.config.packageoverrides不反映在环境中。Systempackages

Question

看来，当我覆盖 nixpkgs.config.packageoverrides 或 nixpkgs.overlays 的python应用程序 Environment> Environment.smentpackages 不在使用这些覆盖。我如何才能在Python3应用程序中使用该覆盖的Python3软件包？

示例使用 nixpkgs.overlays > darwin-configuration.nix ：

{ config, pkgs, lib, ... }:
{
  environment.systemPackages =
    [
      pkgs.myawscli2
    ];
  nixpkgs.overlays = let overlayRemovePyopenssl = self: super: 
    let removePyopenssl = pythonpkgs:
      lib.filter
        (pythonpkg: !(pythonpkg != null && pythonpkg ? pname && pythonpkg.pname == "pyopenssl"))
        pythonpkgs;
    in {
      python3 = super.python3.override {
        packageOverrides = python-self: python-super: rec {
          # Delete pyopenssl; workaround for broken package on darwin-aarch64
          # “Package ‘python3.10-pyopenssl-22.0.0’ in /nix/store/<hash>-nixpkgs/nixpkgs/pkgs/development/python-modules/pyopenssl/default.nix:73 is marked as broken, refusing to evaluate”
          # https://github.com/NixOS/nixpkgs/issues/174457
          urllib3 = python-super.urllib3.overridePythonAttrs (origattrs: rec {
            propagatedBuildInputs = removePyopenssl origattrs.propagatedBuildInputs;
          });
          twisted = python-super.twisted.overridePythonAttrs (origattrs: {
            checkInputs = removePyopenssl origattrs.checkInputs;
          });
        };
      };
      myawscli2 = (self.awscli2.override {
        # override the python3 arg of awscli2
        # https://github.com/NixOS/nixpkgs/blob/f72be3af76fb7dc45e2088d8cb9aba1e6767a930/pkgs/tools/admin/awscli2/default.nix#L2
        python3 = self.python3;
      });
    }; in
  [
    overlayRemovePyopenssl
  ];
  system.stateVersion = 4;
}

覆盖层适当地应用于单个Python软件包urllib3：

nix-repl> lib = import <nixpkgs>.lib
nix-repl> :l <darwin>
nix-repl> lib.forEach pkgs.python3.pkgs.urllib3.propagatedBuildInputs (x: x.pname)
[ "brotli" "certifi" "cryptography" "idna" "python3" ]

但是，覆盖层是不是 应用于Python应用程序使用Urllib3。请注意，AWSCli2使用时，pyopenssl在Urllib3的依赖项中：

nix-repl> lib.forEach (lib.findFirst (x: x.pname == "urllib3") null pkgs.awscli2.propagatedBuildInputs).propagatedBuildInputs (x: x.pname)
[ "brotli" "certifi" "cryptography" "idna" "pyopenssl" "python3" ]

我还使用 nixpkgs.config.package.packageoverrides 尝试了相同的效果：

{ config, pkgs, lib, ... }:
{
  environment.systemPackages =
    [
      pkgs.myawscli2
    ];
  nixpkgs.config.packageOverrides = super: 
    let removePyopenssl = pythonpkgs:
      lib.filter
        (pythonpkg: !(pythonpkg != null && lib.hasAttr "pname" pythonpkg && pythonpkg.pname == "pyopenssl"))
        pythonpkgs;
    in {
      python3 = super.python3.override {
        packageOverrides = python-self: python-super: rec {
          # workaround for
          # “Package ‘python3.10-pyopenssl-22.0.0’ in /nix/store/<hash>-nixpkgs/nixpkgs/pkgs/development/python-modules/pyopenssl/default.nix:73 is marked as broken, refusing to evaluate”
          # https://github.com/NixOS/nixpkgs/issues/174457
          urllib3 = python-super.urllib3.overridePythonAttrs (origattrs: rec {
            propagatedBuildInputs = removePyopenssl origattrs.propagatedBuildInputs;
          });
          twisted = python-super.twisted.overridePythonAttrs (origattrs: {
            checkInputs = removePyopenssl origattrs.checkInputs;
          });
        };
      };
      myawscli2 = (pkgs.awscli2.override {
        python3 = pkgs.python3;
      });
    };
  system.stateVersion = 4;
}

这似乎与 nixpkgs手册代码> pythonpackages.twisted 现在已被全局覆盖。现在使用所有包装以及所有引用 twisted （例如 services.buildbot-worker ）的NIXOS服务现在使用新的定义”

Answer 1

我还在awscli2/default. nix 调用 python3.override {packageoverrides =…;} ：

  py = python3.override {
    packageOverrides = self: super: {
      …
    };
  };

不幸的是，这覆盖了我自己的 .override {packageoverrides =…;} 。不幸的是，您无法撰写（Python.override {packageOverRides =…;}）。覆盖{packageoverrides =…;}

我通过检查nixpkgs并编辑AWSCli2 Nix来解决此问题。 packageoverrides 带有 packageoverrides 从参数：

  py = python3.override (oldargs: {
    packageOverrides = self: super: {
      …
    } // (if oldargs?packageOverrides then (oldargs.packageOverrides self super) else super);
  });