./try-reflex stuck on NixOs despite binary caches enables

[rubenmoor]

After 2 minutes it gets stuck like so (no progress after 25 minutes):

copying path '/nix/store/xqzjpj4krb7ij7kcys74ymw5lqkd06vv-all-cabal-hashes-component-connection-0.3.1' from 'https://nixcache.reflex-frp.org'...
building '/nix/store/wz2a63b6f0867dr0ciiya7rs21xsp5im-cabal2nix-connection-0.3.1.drv'...
installing
these paths will be fetched (13.96 MiB download, 192.79 MiB unpacked):
  /nix/store/2ylqm4wbyhdssdkaingcrvx1bdj5pkx9-ghcjs-8.6.0.1-with-packages
  /nix/store/4r6zrh31i618n2nr3jhfgr5l7nv91xz7-shell-x86_64-linux
  /nix/store/764a1j241v73gcfsm273s7s5s0w64s0y-reflex-dom-core-0.6.1.0-js-unknown-ghcjs
  /nix/store/7y7sz0przfm1kvlvx33npgk5fv46gqh4-mmorph-1.1.3-js-unknown-ghcjs
  /nix/store/ddx6xrcdnahsxrqnb45h38dgg35dl822-reflex-todomvc-0.1-js-unknown-ghcjs-doc
  /nix/store/jp7z706dal3s99p8q424khvrsc13ysig-reflex-dom-0.6.1.0-js-unknown-ghcjs-doc
  /nix/store/jvwgza6f6hsjk2l7k9yz2fzx86rpa646-reflex-todomvc-0.1-js-unknown-ghcjs
  /nix/store/qsqdi9aphxy0wylscv1d78b98cmzllmn-reflex-0.8.0.0-js-unknown-ghcjs-doc
  /nix/store/sbl6z9by8shkixm1mdgvcy5l375f6kjf-hoogle-local-0.1
  /nix/store/vyp22l0zw1457yl4bcpcxp7xmj87fgmp-reflex-0.8.0.0-js-unknown-ghcjs
  /nix/store/xm9dz578ci1sq467cy91f7r9l01lylrd-reflex-dom-core-0.6.1.0-js-unknown-ghcjs-doc
  /nix/store/yqhyq29zi39zma12fshavv3z6xqwrzvc-reflex-dom-0.6.1.0-js-unknown-ghcjs
don't know how to build these paths:
  /nix/store/rj4sqdi2rs2b8f9ahn968mq96agwsl44-mmorph-1.1.3-js-unknown-ghcjs-doc
building '/nix/store/pr50g000rvs6dawb889434swc485876k-ghcjs-prologue.txt.drv'...

I am on NixOS 20.03.3324.929768261a3 (Markhor)

[rubenmoor]

I end up in the same state (no error, just stuck) by running nix-shell -A shell.ghcjs following the developer tutorial.

[rubenmoor]

I can confirm that everything works fine on release/0.6.2.0 and it's broken as described above on release/0.7.0.0 and development

[anfelor]

This affected me as well. Version v0.6.2.0 worked. I am on Ubuntu 20.04

[bidigo]

I can confirm this too. Building our app with nix-build doesn't work anymore, ob run works fine however.

[dfordivam]

Not sure what the problem here is, as I could download the .nar file from the s3 via manual wget. As a workaround the --option substitute false to the nix-build/nix-shell can be used to build everything locally.

[rubenmoor]

As a workaround, I added to my default.nix:

  overrides = self: super: {
    mmorph = self.callHackage "mmorph" "1.1.3" {};