nix: clean up devshell

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ia844e89f1450cce1625c57c9d81279706a6a6964

nix/shell.nix

@@ -1,28 +1,26 @@
 {
   mkShell,
-  rust-analyzer,
+  rustc,
+  cargo,
   rustfmt,
   clippy,
-  cargo,
+  taplo,
-  gcc,
+  rust-analyzer-unwrapped,
-  openssl,
+  rustPlatform,
-  pkg-config,
-  rustc,
 }:
 mkShell {
-  name = "eris";
+  name = "rust";
+
   packages = [
-    rust-analyzer
+    rustc
-    rustfmt
+    cargo
+
+    (rustfmt.override {asNightly = true;})
     clippy
     cargo
-    gcc
+    taplo
-    clippy
+    rust-analyzer-unwrapped
-    rustfmt
-    rustc
-
-    # For TLS and friends
-    openssl
-    pkg-config
   ];
+
+  RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
 }