```$> nix-env -qa | grep cmake
cmake-2.8.12.2
cmake-3.19.7
cmake-boot-3.19.7
cmake-cursesUI-3.19.7
cmake-cursesUI-qt4UI-3.19.7
cmake-cursesUI-qt5UI-3.19.7
cmake-format-0.6.13
cmake-language-server-0.1.2
cmake-modules-webos-19
elementary-cmake-modules-0.1.0
extra-cmake-modules-5.80.0
extra-cmake-modules-5.80.0
extra-cmake-modules-5.80.0
gccmakedep-1.0.3
icmake-9.03.01
rocm-cmake-4.1.0
vimplugin-coc-cmake-0.1.1
$> nix-shell -p cmake-cursesUI
error: undefined variable 'cmake-cursesUI'

       at «string»:1:94:

            1| with import <nixpkgs> { }; (pkgs.runCommandCC or pkgs.runCommand) "shell" { buildInputs = [ (cmake-cursesUI) ]; } ""
             |                                                                                              ^
(use '--show-trace' to show detailed location information)
$> nix-shell -p cmake-cursesUI-3.19.7
error: undefined variable 'cmake-cursesUI-3'

       at «string»:1:94:

            1| with import <nixpkgs> { }; (pkgs.runCommandCC or pkgs.runCommand) "shell" { buildInputs = [ (cmake-cursesUI-3.19.7) ]; } ""
             |                                                                                              ^
(use '--show-trace' to show detailed location information)```