fakeNss: move to toplevel

Make this reachable from pkgs.fakeNss. This is useful outside docker
contexts, too.

https://github.com/NixOS/nixpkgs/pull/164943#discussion_r833220769

1 files changed, 2 insertions, 19 deletions

diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index 5718cadd4ff..96ea363c811 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -6,6 +6,7 @@
 , coreutils
 , e2fsprogs
 , fakechroot
+, fakeNss
 , fakeroot
 , findutils
 , go
@@ -747,25 +748,7 @@ rec {
   # Useful when packaging binaries that insist on using nss to look up
   # username/groups (like nginx).
   # /bin/sh is fine to not exist, and provided by another shim.
-  fakeNss = symlinkJoin {
-    name = "fake-nss";
-    paths = [
-      (writeTextDir "etc/passwd" ''
-        root:x:0:0:root user:/var/empty:/bin/sh
-        nobody:x:65534:65534:nobody:/var/empty:/bin/sh
-      '')
-      (writeTextDir "etc/group" ''
-        root:x:0:
-        nobody:x:65534:
-      '')
-      (writeTextDir "etc/nsswitch.conf" ''
-        hosts: files dns
-      '')
-      (runCommand "var-empty" { } ''
-        mkdir -p $out/var/empty
-      '')
-    ];
-  };
+  inherit fakeNss; # alias
 
   # This provides a /usr/bin/env, for shell scripts using the
   # "#!/usr/bin/env executable" shebang.