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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Update: Tom Ellis helped me to discover that I probably had not completed my WSL1 -> WSL2 changeover on my laptop, so the error I got below came from WSL1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Once we’d unravelled that, the error went away. So it seems that WSL1 is to blame, not ghcup, happily.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I wonder if someone might add to this page
</span><a href="https://www.haskell.org/ghcup/">https://www.haskell.org/ghcup/</a>
<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">a prominent notice saying “Does not work with WLS1”,
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">explaining how to find out how to know what version you are running (wsl -l -v in Powershell)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">pointing to the instructions for upgrading to WSL2
<a href="https://docs.microsoft.com/en-us/windows/wsl/install-win10">https://docs.microsoft.com/en-us/windows/wsl/install-win10</a><o:p></o:p></li></ul>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin:0cm"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> ghc-devs <ghc-devs-bounces@haskell.org>
<b>On Behalf Of </b>Simon Peyton Jones via ghc-devs<br>
<b>Sent:</b> 02 June 2021 20:07<br>
<b>To:</b> GHC <ghc-devs@haskell.org><br>
<b>Cc:</b> Julian Ospald <hasufell@posteo.de><br>
<b>Subject:</b> ghcup failed<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dear devs<o:p></o:p></p>
<p class="MsoNormal">I wanted to install GHC 8.10 on my WSL2 (Windows Subsystem for Linux) computer. So I went here<o:p></o:p></p>
<p class="MsoNormal"><a href="https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.haskell.org%2Fghcup%2F&data=04%7C01%7Csimonpj%40microsoft.com%7C941d2a501a8a451f026b08d925f9c287%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637582576926132378%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Qbhmg5LysvmW2srYmLM2AONWdG5SvZJVOtRFFFlHfNw%3D&reserved=0">https://www.haskell.org/ghcup/</a><o:p></o:p></p>
<p class="MsoNormal">and followed the instructions (the curl … command). There was a long pause then<o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">[ Info ] verifying digest of: ghc-8.10.4-x86_64-deb9-linux.tar.xz</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">[ Info ] Unpacking: ghc-8.10.4-x86_64-deb9-linux.tar.xz to /tmp/ghcup-khiegA</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">[ Info ] Installing GHC (this may take a while)</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">[ Error ] BuildFailed failed in dir "/tmp/ghcup-khiegA": NonZeroExit 2 "make" ["install"]</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt"> Check the logs at "/home/simonpj/.ghcup/logs" and the build directory "/tmp/ghcup-khiegA" for more clues.</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt"> Make sure to clean up "/tmp/ghcup-khiegA" afterwards.</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">"_eghcup --cache install ghc recommended" failed!</span><o:p></o:p></p>
<p class="MsoNormal">I looked in the logs as suggested, and found this in the tail of ghc-make.log<o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">Installing library in /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/libiserv-8.10.4</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">"utils/ghc-cabal/dist-install/build/tmp/ghc-cabal-bindist" copy compiler stage2 "strip" '' '/home/simonpj/.ghcup/ghc/8.10.4' '/home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4' '/home/simonpj/.ghcup/ghc/8.10.4/share/doc/ghc-8.10.4/html/libraries'
'v p dyn'</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">Installing library in /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/ghc-8.10.4</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">"/home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/bin/ghc-pkg" --force --global-package-db "/home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/package.conf.d" update rts/dist/package.conf.install</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">ghc-pkg: Couldn't open database /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/package.conf.d for modification: {handle: /home/simonpj/.ghcup/ghc/8.10.4/lib/ghc-8.10.4/package.conf.d/package.cache.lock}: hLock:
invalid argument (Invalid argument)</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">ghc.mk:967: recipe for target 'install_packages' failed</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">make[1]: *** [install_packages] Error 1</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">Makefile:51: recipe for target 'install' failed</span><o:p></o:p></p>
<p class="Code"><span style="font-size:9.0pt">make: *** [install] Error 2</span><o:p></o:p></p>
<p class="MsoNormal">So I seem to be stuck. Any ideas? I feel embarrassed not to be able to install GHC
<span style="font-family:"Segoe UI Emoji",sans-serif">😊</span>.<o:p></o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
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