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Have solved the issue with help from JP Moresmau.</div><div><br></div><div>Used the command </div><div><br></div><div>cabal install --dry-run --verbose=3 --global build wrapper</div><div><br></div><div>And this gave enough detailed info to enable me to remove the conflict and resolve the issue.</div><div><br></div><div>Thanks goes to JP !</div><div><br></div>
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<p style="color: #A0A0A8;">On Wednesday, 9 May 2012 at 09:55, Graham Berks wrote:</p>
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Given that I have the dependant packages already installed when I do
</div><div><br></div><div><span style="color: rgb(85, 85, 85); font-family: arial, helvetica, clean, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">$ cabal install --dry-run --global buildwrapper
Resolving dependencies...
In order, the following would be installed:
mtl-2.1.1 (new version)
aeson-0.6.0.2 (reinstall) changes: mtl-2.0.1.0 -> 2.1.1
parsec-3.1.2 (reinstall) changes: mtl-2.0.1.0 -> 2.1.1
regex-base-0.93.2 (reinstall) changes: mtl-2.0.1.0 -> 2.1.1
regex-tdfa-1.1.8 (reinstall) changes: mtl-2.0.1.0 -> 2.1.1
buildwrapper-0.5.2 (new package)</span></div><div><span style="color: rgb(85, 85, 85); font-family: arial, helvetica, clean, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; "><br></span></div><div style="text-align: left;"><font color="#555555" face="arial, helvetica, clean, sans-serif"><span style="line-height: 18px; white-space: pre-wrap;">And that build wrapper doesn't have a defined dependency version number for MTL </span></font></div><div style="text-align: left;"><font color="#555555" face="arial, helvetica, clean, sans-serif"><span style="line-height: 18px; white-space: pre-wrap;">can someone tell me why cabal is trying to install a new version of MTL ?</span></font></div><div style="text-align: left;"><font color="#555555" face="arial, helvetica, clean, sans-serif"><span style="line-height: 18px; white-space: pre-wrap;"><br></span></font></div><div style="text-align: left;"><font color="#555555" face="arial, helvetica, clean, sans-serif"><span style="line-height: 18px; white-space: pre-wrap;">Thanks</span></font></div>
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