nix-build Cargo.nix fails

[573]

Issue description

Running nix-build Cargo.nix -A hello following the "User's Guide to the Rust Infrastructure" in Nix Manual fails regarding pkg-config (https://gist.github.com/573/bfed92ee79c7658708557618c93f3786#file-logfile-L91) although "missing library" is installed (https://gist.github.com/573/bfed92ee79c7658708557618c93f3786#file-logfile-L115).

Steps to reproduce

https://gist.github.com/573/bfed92ee79c7658708557618c93f3786#file-readme-md

Technical details

$ nix-shell -p nix-info --run "nix-info -m"

• system: "x86_64-linux"
• host os: Linux 4.4.0-17134-Microsoft, Arch Linux, noversion
• multi-user?: no
• sandbox: no
• version: nix-env (Nix) 2.2.1
• channels(dkahlenberg): "nixpkgs-19.03pre167327.11cf7d6e1ff"
• nixpkgs: /home/dkahlenberg/.nix-defexpr/channels/nixpkgs