mkDerivation error message not helpful when version isn't present ("error: derivation name missing")

[toraritte]

Describe the bug
Removed the version attribute from mkDerivation when hacking on a package, mistook pname for name, then tried to build it thinking all's fine when I received the error: derivation name missing.

Steps to reproduce the behavior:

# nixpkgs/pkgs/servers/sip/freeswitch/default.nix
stdenv.mkDerivation rec {
  pname = "freeswitch";
  # version = "0.1";
  src = fetchFromGitHub {
  # ...

~/clones/nixpkgs $ nix-shell . -A freeswitch
error: derivation name missing

Expected behavior
An error message that points out that mkDerivation's input attribute set has to have either a name attribute, or a pname and a version attribute (as per RFC-0035). The Nixpkgs manual entry is clear about this, but I though only name is present, and I missed the p so it took a while to track it down...

Additional context
The error message is coming from derivation but I understand that this should be handled probably in pkgs/stdenv/generic/make-derivation.nix.

Metadata

• system: "x86_64-linux"
• host os: Linux 5.4.89, NixOS, 20.09.2624.1eff582e7ea (Nightingale)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.10
• channels(root): "nixos-20.09.2624.1eff582e7ea"
• channels(toraritte): "nixos-20.09.3009.8e78c2cfbae"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: `mkDerivation` (?)
# a list of nixos modules affected by the problem
module: `stdenv`

[stale]

I marked this as stale due to inactivity. → More info

[syvb]

@Stale still relevant to me

[Skallwar]

I encountered the same error today

[luisnquin]

Same here

[Ashvith10]

This issue still persists.

[bramtechs]

Can confirm it is still an issue.