gistfile1.txt

\cs_new_protected:Npn \__npkg_package:nnn #1#2#3
  {
    \texorpdfstring
      {
        \bool_if:nTF {#1}
          { \__npkg_package_format:n {#3} }
          { \href {#2} { \__npkg_package_format:n {#3} } }
      }
      {#3}
  }
\cs_new_protected:Npn \__npkg_package:nn #1#2
  { \__npkg_package:nnn {#1} { \c__npkg_standard_url_str #2 } {#2} }

\NewDocumentCommand {\package} {sO{}m}
  {
    \IfValueTF {#2} { \__npkg_package:nnn {#1} {#2} {#3} }
                    { \__npkg_package:nn  {#1} {#3} }
  }