fix(wpcarro/nix): Remove <briefcase> references r/3249

Angle-bracketed references are a Nix anti-pattern, and thankfully this
repository enforces this as a standard.

TL;DR:
- Drop angle-bracketed references
- Change `briefcase` -> `users.wpcarro`
- Fix any resulting regressions
- Fix //users/wpcarro/tools/simple_vim
- Mark //users/wpcarro/boilerplate/typescript and related projects
  as broken
- drop .skip-subtree file, enabling depot CI

Change-Id: I7153cbabafa617bfd6b199370cbec65cb75441f6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4325
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: wpcarro <wpcarro@gmail.com>

2 files changed, 6 insertions, 6 deletions

diff --git a/users/wpcarro/website/sandbox/learnpianochords/src/server/default.nix b/users/wpcarro/website/sandbox/learnpianochords/src/server/default.nix
index 87de69cbd627..262693ae821e 100644
--- a/users/wpcarro/website/sandbox/learnpianochords/src/server/default.nix
+++ b/users/wpcarro/website/sandbox/learnpianochords/src/server/default.nix
@@ -1,6 +1,6 @@
-let
-  briefcase = import <briefcase> {};
-in briefcase.buildHaskell.program {
+{ depot, ... }:
+
+depot.users.wpcarro.buildHaskell.program {
   name = "server";
   srcs = builtins.path {
     path = ./.;
diff --git a/users/wpcarro/website/sandbox/learnpianochords/src/server/shell.nix b/users/wpcarro/website/sandbox/learnpianochords/src/server/shell.nix
index ab470841e6c1..6ec8264470db 100644
--- a/users/wpcarro/website/sandbox/learnpianochords/src/server/shell.nix
+++ b/users/wpcarro/website/sandbox/learnpianochords/src/server/shell.nix
@@ -1,6 +1,6 @@
-let
-  briefcase = import <briefcase> {};
-in briefcase.buildHaskell.shell {
+{ depot, ... }:
+
+depot.users.wpcarro.buildHaskell.shell {
   deps = hpkgs: with hpkgs; [
     hspec
     servant-server