feat(hm/price): use rust nightly

flake.nix

@@ -7,6 +7,10 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     nixpkgs-master.url = "github:nixos/nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     lanzaboote = {
       url = "github:nix-community/lanzaboote";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -89,6 +93,7 @@
               imports = [ inputs.agenix.homeManagerModules.default ];
               nixpkgs.overlays = [
                 inputs.emacs-overlay.overlays.default
+                inputs.fenix.overlays.default
                 self.overlays.modifications
                 self.overlays.additions
               ];

users/price/conf/rust/default.nix

@@ -0,0 +1,27 @@
+{
+  config,
+  pkgs,
+  ...
+}:
+{
+  home = {
+    sessionVariables = {
+      CARGO_HOME = "${config.xdg.dataHome}/cargo";
+      RUSTUP_HOME = "${config.xdg.dataHome}/rustup";
+      RUST_SRC_PATH = "${pkgs.fenix.complete.rust-src}/lib/rustlib/src/rust/library";
+    };
+    packages = with pkgs; [
+      (pkgs.fenix.complete.withComponents [
+        "cargo"
+        "clippy"
+        "rust-src"
+        "rustc"
+        "rustfmt"
+      ])
+      rust-analyzer-nightly
+      cargo-watch
+      cargo-nextest
+    ];
+
+  };
+}

users/price/home.nix

@@ -68,10 +68,6 @@ in
         Fmt
         screen-cap
         nodePackages.prettier
-        cargo
-        clippy
-        rustc
-        rustfmt
         python3
         shfmt
         bob-nvim
@@ -156,15 +152,12 @@ in
         pkg-config
         openssl.dev
         curl.dev
-      ]
-      ++ [ rust-analyzer ];
+      ];
 
     file = softLinkDots ".config";
 
     sessionVariables = {
       _ZL_DATA = "${config.xdg.cacheHome}/zlua";
-      RUSTUP_HOME = "${config.xdg.dataHome}/rustup";
-      CARGO_HOME = "${config.xdg.dataHome}/cargo";
       OMNISHARPHOME = "${config.xdg.configHome}/omnisharp";
       NPM_CONFIG_USERCONFIG = "${config.xdg.configHome}/npm/npmrc";
       TERMINFO_DIRS = "${config.home.profileDirectory}/share/terminfo";