error:
… while calling the 'derivationStrict' builtin
at /builtin/derivation.nix:9:12: (source not available)
… while evaluating derivation 'nix-shell'
whose name attribute is located at /nix/store/hr2hwc49p0gym4rx1m1j4ppn6cncxxs3-nixpkgs/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:336:7
… while evaluating attribute 'buildInputs' of derivation 'nix-shell'
at /nix/store/hr2hwc49p0gym4rx1m1j4ppn6cncxxs3-nixpkgs/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:383:7:
depsHostHost = elemAt (elemAt dependencies 1) 0;
383| buildInputs = elemAt (elemAt dependencies 1) 1;
| ^
384| depsTargetTarget = elemAt (elemAt dependencies 2) 0;
… while evaluating derivation 'ostree-2020.8'
whose name attribute is located at /nix/store/hr2hwc49p0gym4rx1m1j4ppn6cncxxs3-nixpkgs/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:336:7
… while evaluating attribute 'patches' of derivation 'ostree-2020.8'
at /nix/store/hr2hwc49p0gym4rx1m1j4ppn6cncxxs3-nixpkgs/nixpkgs/pkgs/stdenv/generic/make-derivation.nix:400:14: