added installation page

cosmopolitan.nix

@@ -1,93 +0,0 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, bintools-unwrapped
-, callPackage
-, coreutils
-, substituteAll
-, unzip
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "cosmopolitan";
-  version = "2.2";
-
-  src = fetchFromGitHub {
-    owner = "jart";
-    repo = "cosmopolitan";
-    rev = finalAttrs.version;
-    hash = "sha256-DTL1dXH+LhaxWpiCrsNjV74Bw5+kPbhEAA2Z1NKiPDk=";
-  };
-
-  patches = [
-    # make sure tests set PATH correctly
-    (substituteAll {
-      src = ./fix-paths.patch;
-      inherit coreutils;
-    })
-  ];
-
-  nativeBuildInputs = [
-    bintools-unwrapped
-    unzip
-  ];
-
-  strictDeps = true;
-
-  outputs = [ "out" "dist" ];
-
-  # slashes are significant because upstream uses o/$(MODE)/foo.o
-  buildFlags = [
-    "o/cosmopolitan.h"
-    "o//cosmopolitan.a"
-    "o//libc/crt/crt.o"
-    "o//ape/ape.o"
-    "o//ape/ape.lds"
-    "o//tool/net/redbean.com"
-  ];
-
-  checkTarget = "o//test";
-
-  enableParallelBuilding = true;
-
-  doCheck = false;
-  dontConfigure = true;
-  dontFixup = true;
-
-  preCheck = let
-    failingTests = [
-      # some syscall tests fail because we're in a sandbox
-      "test/libc/calls/sched_setscheduler_test.c"
-      "test/libc/thread/pthread_create_test.c"
-      "test/libc/calls/getgroups_test.c"
-      # fails
-      "test/libc/stdio/posix_spawn_test.c"
-    ];
-  in lib.concatStringsSep ";\n" (map (t: "rm -v ${t}") failingTests);
-
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p $out/{include,lib,bin}
-    install o/cosmopolitan.h $out/include
-    install o/cosmopolitan.a o/libc/crt/crt.o o/ape/ape.{o,lds} o/ape/ape-no-modify-self.o $out/lib
-    install o/tool/net/redbean.com $out/bin/xrsh.com
-    cp -RT . "$dist"
-
-    runHook postInstall
-  '';
-
-  passthru = {
-    cosmocc = callPackage ./cosmocc.nix {
-      cosmopolitan = finalAttrs.finalPackage;
-    };
-  };
-
-  meta = {
-    homepage = "https://xrsh.isvery.ninja/";
-    description = "XR shell runs a linux ISO in WebXR";
-    license = lib.licenses.isc;
-    maintainers = lib.teams.cosmopolitan.members;
-    platforms = lib.platforms.x86_64;
-  };
-})