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+---
+title: FAQ
+---
+
+## Does Hakyll support syntax highlighting?
+
+Syntax highlighting is enabled by default in Hakyll. However, you also need to
+enable it in pandoc. If no syntax highlighting shows up, try
+
+    [jasper@phoenix] cabal install --reinstall -fhighlighting pandoc
+
+## When should I rebuild and when should I build?
+
+If you execute a `./hakyll build`, Hakyll will build your site incrementally.
+This means it will be very fast, but it will not pick up _all_ changes.
+
+- In case you edited `hakyll.hs`, you first want to compile it again.
+- It is generally recommended to do a `./hakyll rebuild` before you deploy your
+  site.
+
+After rebuilding your site, all files will look as "modified" to the filesystem.
+This means that when you upload your site, it will usually transfer all files --
+this can generate more traffic than necessary, since it is possible that some
+files were not actually modified. If you use `rsync`, you can counter this using
+the `--checksum` option.
+
+## Problem with regex-pcre dependency on Mac OS
+
+Hakyll requires [regex-pcre], which might fail to build on Mac OS. To solve
+this problem, make sure the [pcre] C library is installed (via homebrew or
+macports). Then install [regex-pcre] using:
+
+    cabal install --extra-include-dirs=/usr/local/include regex-pcre
+
+or
+
+    cabal install --extra-include-dirs=/opt/local/include regex-pcre
+
+...and proceed to install Hakyll the regular way.
+
+[regex-pcre]: http://hackage.haskell.org/package/regex-pcre
+[pcre]: http://www.pcre.org/
+
+## "File name does not match module name" on Mac OS
+
+    Hakyll.hs:1:1:
+        File name does not match module name:
+        Saw: `Main'
+        Expected: `Hakyll'
+
+Is an error encountered on Mac OS when `hakyll.hs` is located on a
+case-insensitive filesystem. A workaround is to rename it to something that
+isn't the name of the module, for example, `site.hs`.