title: Error When Using Manually Installed .sty Package for TeX Live [Arch Linux]
body: <p>I am trying to install mathpartir on Arch Linux. I have Tex Live installed from the repository (pdflatex version 3.14159265-2.6-1.40.18). I ran the .ins file through LaTeX and generated a .sty file. I have moved the .sty file to /usr/share/texmf-dist/tex/latex/mathpartir and ran texhash and mktexlsr, but when I try to run pdflatex on the file</p>
  
  <pre><code>\documentclass{article}
    \begin{document}
      \begin{mathpar}
      \end{mathpar}
    \end{document}
  </code></pre>
  
  <p>I get the error:</p>
  
  <pre><code>! LaTeX Error: Environment mathpar undefined.
  </code></pre>
  
  <p>I have also tried putting the .sty file in /usr/share/texmf-dist/tex/latex/base, in the same directory as the .tex file I am running, and in ~/texmf but nothing is working. Does anyone have any idea how to fix this?</p>