<div dir="ltr">Thanks Jack. I have  used ghcup previously but had forgotten  about it - one problem solved!<div><br></div><div>regards</div><div>David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Oct 31, 2020 at 8:38 PM <<a href="mailto:jack@jackkelly.name">jack@jackkelly.name</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Hello David,<br>
<br>
November 1, 2020 4:35 AM, "David Duke" <<a href="mailto:duke.j.david@gmail.com" target="_blank">duke.j.david@gmail.com</a>> wrote:<br>
<br>
> I'm in the process of having to reinstall ghc-8.6.3 in order to use a library (gtk) where the last<br>
> successful build is 8.6.3. I was able to do that on linux. However I'm now trying to repeat this<br>
> under OSX.<br>
<br>
I don't use macOS so I can't answer your build question directly, but do you use ghcup ( <a href="https://www.haskell.org/ghcup/" rel="noreferrer" target="_blank">https://www.haskell.org/ghcup/</a> ) to manage your GHC versions? It looks like ghcup has been told about 8.6.3 on darwin: <a href="https://gitlab.haskell.org/haskell/ghcup/-/blob/8f4705a50eefafd92ceef32094eec7140885b3d5/.download-urls#L99" rel="noreferrer" target="_blank">https://gitlab.haskell.org/haskell/ghcup/-/blob/8f4705a50eefafd92ceef32094eec7140885b3d5/.download-urls#L99</a><br>
<br>
HTH,<br>
<br>
-- Jack<br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>David Duke</div><div>Emeritus Professor of Computer Science</div><div>School of Computing University of Leeds UK</div><div><a href="mailto:E%3Aduke.j.david@gmail.com" target="_blank">E:duke.j.david@gmail.com</a></div><div>W:<a href="https://engineering.leeds.ac.uk/staff/334/Professor_David_Duke" target="_blank">https://engineering.leeds.ac.uk/staff/334/Professor_David_Duke</a></div></div></div></div></div></div></div></div></div>