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I have texlive-fonts-extra installed:

$ port installed texlive-fonts-extra
The following ports are currently installed:
  texlive-fonts-extra @22691_0+doc (active)

According to https://trac.macports.org/wiki/TeXLivePackages, texlive-fonts-extra has doublestroke

However, while compiling ($ pdflatex article.tex) a .tex file containing

\usepackage{mathtools, doublestroke}

I get

! LaTeX Error: File `doublestroke.sty' not found.

I am using the correct copy of latex since

$ which pdflatex

What should I do to troubleshoot?

share|improve this question
There is no doublestroke.sty package. The name to use is dsfont – egreg Mar 8 '12 at 22:38
Thanks @egreg, that worked! Wanna put it in an answer so I can accept it? – highBandWidth Mar 8 '12 at 22:44

I don't think there is a doublestroke package. According to the documentation for doublestroke you need


Alternatively, you can access the font as follows, but the package is the better option.

\[\hbox{\dsrom N}=\{0,1,2,\ldots\}\]
share|improve this answer
The usage of \font in LaTeX is highly discouraged. Would you consider removing that part? – egreg Mar 8 '12 at 22:44
@egreg --- I posted too quickly, in a failed effort to get there before you! I have corrected my answer. – Ian Thompson Mar 8 '12 at 22:46
I had TeX Live Utility running. :) – egreg Mar 8 '12 at 22:49

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