Rogan,<div><br></div><div>Thanks for taking a look at it.  No, mtl is not the problem, at least not yet.</div><div><br></div><div>A detail that I&#39;ve discovered is important: I&#39;m on Mac OS X (10.6).  readline is my problem, and readline + mac + haskell seems to be a bad mix.</div>
<div><br></div><div>Macports installs readline in /opt/local/ by default, so I discovered I needed to install this way:</div><div>cabal install lambdabot --configure-option=--with-readline-includes=&quot;/opt/local/include&quot; --configure-option=--with-readline-libraries=&quot;/opt/local/lib&quot;</div>
<div><br></div><div>That got the readline dependency installed correctly, but then the lambdabot build complained about the architecture (32- vs 64-bit).  This <a href="http://osdir.com/ml/libraries@haskell.org/2010-04/msg00171.html">thread</a> was somewhat helpful.  I reinstalled readline via macports with the universal flag and got past that error.</div>
<div><br></div><div>Now I&#39;m stuck on readline again [lambdabot build step 28 of 81]:</div><div><div>&quot;/Users/joe/.cabal/lib/readline-1.0.1.0/ghc-6.12.3/HSreadline-1.0.1.0.o: unknown symbol `_rl_basic_quote_characters&#39;&quot;</div>
</div><div><br></div><div>What do I do with that?</div>