Problem with digits in URLs when using mathspec and hyperref

Question

When I use mathspec's \setmathsfont and hyperref, and try to typeset a URL, most of the URL uses monospace, as it should. Good.

However, digits use the maths font. Anyone know how to fix this?

MWE

\documentclass{article}
\usepackage{mathspec,fontspec,hyperref}

\setmathsfont(Digits){Minion Pro}
\setmonofont{Source Code Pro}

\begin{document}
\nolinkurl{abc123def} % same problem with \url{..}
\end{document}

Output

Answer 1

The problem is due to the fact that mathspec makes the digits of type mathord not mathalpha. Then the work done by hyperref to set up to use the ttfamily does not conclude successfully for the digits, as it proceeds in math mode.

\documentclass{article}
\usepackage{mathspec,fontspec,hyperref}

\setmathsfont(Digits){Minion Pro}

\makeatletter
     \DeclareMathSymbol{0}{\mathalpha}{\eu@DigitsArabic@symfont}{`0}
     \DeclareMathSymbol{1}{\mathalpha}{\eu@DigitsArabic@symfont}{`1}
     \DeclareMathSymbol{2}{\mathalpha}{\eu@DigitsArabic@symfont}{`2}
     \DeclareMathSymbol{3}{\mathalpha}{\eu@DigitsArabic@symfont}{`3}
     \DeclareMathSymbol{4}{\mathalpha}{\eu@DigitsArabic@symfont}{`4}
     \DeclareMathSymbol{5}{\mathalpha}{\eu@DigitsArabic@symfont}{`5}
     \DeclareMathSymbol{6}{\mathalpha}{\eu@DigitsArabic@symfont}{`6}
     \DeclareMathSymbol{7}{\mathalpha}{\eu@DigitsArabic@symfont}{`7}
     \DeclareMathSymbol{8}{\mathalpha}{\eu@DigitsArabic@symfont}{`8}
     \DeclareMathSymbol{9}{\mathalpha}{\eu@DigitsArabic@symfont}{`9}
\makeatother

% \setmonofont{Source Code Pro}

\begin{document}
\nolinkurl{abc123def} % same problem with \url{..}
\end{document}