.config/nixpkgs/shells: Add self contained pure env shell

1 files changed, 22 insertions, 0 deletions

diff --git a/.config/nixpkgs/shells/pure.nix b/.config/nixpkgs/shells/pure.nix
new file mode 100644
index 0000000..2e58365
--- /dev/null
+++ b/.config/nixpkgs/shells/pure.nix
@@ -0,0 +1,22 @@
+let
+
+  name = "nix-shell.pure";
+  pkgs = import <nixpkgs> { };
+
+  shell = pkgs.writeShellApplication {
+    inherit name;
+    text = ''
+      /usr/bin/env --ignore-environment /bin/sh -c ${
+        pkgs.writeScript name ''
+          export PS1='\h (${name}) \W \$ '
+          export PATH=${pkgs.lib.strings.makeBinPath [ pkgs.busybox ]}
+          /bin/sh
+        ''
+      };
+    '';
+  };
+
+in pkgs.mkShell {
+  inherit name;
+  shellHook = "exec ${shell}/bin/${shell.name}";
+}