patch completions to workaround https://github.com/rust-lang/rustup/issues/2268

common/users/homeModules/dev/rust.nix

@@ -1,7 +1,22 @@
-{pkgs, ...}: {
+{ pkgs, ... }:
-    home = {
+{
-        packages = with pkgs; [
+  home = {
-            rustup
+    packages = with pkgs; [
-        ];
+      rustup
+    ];
+  };
+  programs = {
+    zsh = {
+      # Few horror things here
+      # 1. rustup's completion is broken for zsh. See: https://github.com/rust-lang/rustup/issues/2268
+      # 2. patch cant read the source file from stdin, so tmpfiles have to be used
+      initExtra = ''
+        TMP_RUSTUP_FILE=$(mktemp)
+        ${pkgs.rustup}/bin/rustup completions zsh > "$TMP_RUSTUP_FILE"
+        eval "$(patch -s -o - -i ${./rustupCompPatch.diff} $TMP_RUSTUP_FILE)"
+        rm $TMP_RUSTUP_FILE
+        unset TMP_RUSTUP_FILE
+      '';
     };
-}
+  };
+}

common/users/homeModules/dev/rustupCompPatch.diff

@@ -0,0 +1,17 @@
+26c26,28
+< '::+toolchain -- release channel (e.g. +stable) or custom toolchain to set override:' \
+---
+> '(+beta +nightly)+stable[use the stable toolchain]' \
+> '(+stable +nightly)+beta[use the beta toolchain]' \
+> '(+stable +beta)+nightly[use the nightly toolchain]' \
+32c34
+<         words=($line[2] "${words[@]}")
+---
+>         words=($line[1] "${words[@]}")
+34,35c36,37
+<         curcontext="${curcontext%:*:*}:rustup-command-$line[2]:"
+<         case $line[2] in
+---
+>         curcontext="${curcontext%:*:*}:rustup-command-$line[1]:"
+>         case $line[1] in
+