I believe you asked this question some months ago, and unfortunately the answer is still the same. The only thing you can do with wai-handler-devel is to try to set these environment variables:<div><br></div><div> <meta http-equiv="content-type" content="text/html; charset=utf-8"><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 13px; ">     &quot;GHC_PACKAGE_PATH&quot;,&quot;./<span class="il" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(240, 159, 129); color: rgb(34, 34, 34); background-position: initial initial; background-repeat: initial initial; ">cabal</span>-<span class="il" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(240, 159, 129); color: rgb(34, 34, 34); background-position: initial initial; background-repeat: initial initial; ">dev</span>/packages-7.0.3.conf/:&quot;<div>

      &quot;PATH&quot;, &quot;./<span class="il" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(240, 159, 129); color: rgb(34, 34, 34); background-position: initial initial; background-repeat: initial initial; ">cabal</span>-<span class="il" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(240, 159, 129); color: rgb(34, 34, 34); background-position: initial initial; background-repeat: initial initial; ">dev</span>/bin&quot;</div>

<div><br></div><div>For yesod devel you could try this also. Otherwise you would need to modify the yesod source to look for a cabal-dev folder and then invoke a cabal-dev process (there is no library interface). </div><div>

<br></div><div>I am hoping for great improvements in yesod devel if the Shaker package can come alive again. The maintainer said he was blocked by a GHC but that is now fixed on head and slated for the 7.0.4 release.</div>

<div><br></div><div>Greg Weber</div></span><br><div class="gmail_quote">On Mon, Jun 13, 2011 at 8:18 AM, &quot;Timo B. Hübel&quot; <span dir="ltr">&lt;<a href="mailto:t.h@gmx.info">t.h@gmx.info</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Hi,<br>
<br>
is it possible to have a sandbox&#39;ed environment like cabal-dev together<br>
with this new &quot;yesod devel&quot;-environment?<br>
<br>
I&#39;ve just thrown together a quick test with cabal-dev and a scaffolded<br>
yesod site, but calling &quot;yesod devel&quot; just gives me a bunch of missing<br>
dependencies.<br>
<br>
Any hints are highly appreciated.<br>
<br>
Thank you,<br>
Timo<br>
<br>
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