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SimpleX – private messaging platform without user identifiers (github.com/simplex-chat)
2 points by rgbrgb on July 17, 2023 | hide | past | favorite | 5 comments


After a quick look the documentation is excellent: tells me clearly what it does, how, and why! A messaging system without user identifiers is something I had wondered about, why it hadn't been done as far as I knew.


Ah well… tried to install the CLI client from source (https://github.com/simplex-chat/simplex-chat/blob/stable/doc...), installed the Haskell compiler GHC v9, the Haskell package manager Cabal, `cabal update` went fine, no problem until `cabal install`:

    cabal: Could not resolve dependencies:
    [__0] next goal: aeson (user goal)
    [__0] rejecting: aeson-2.2.0.0, aeson-2.1.2.1, aeson-2.1.2.0, aeson-2.1.1.0,
    aeson-2.1.0.0 (constraint from user target requires ==2.0.3.0)
    [__0] trying: aeson-2.0.3.0
    [__1] trying: base-4.15.1.0/installed-4.15.1.0 (dependency of aeson)
    [__2] next goal: android-support (user goal)
    [__2] rejecting: android-support-0.1.0.0 (conflict:
    base==4.15.1.0/installed-4.15.1.0, android-support => base^>=4.14.3.0)
    [__2] fail (backjumping, conflict set: android-support, base)
    After searching the rest of the dependency tree exhaustively, these were the
    goals I've had most trouble fulfilling: base, aeson, android-support
“android-support”???

Dependency hell again. I have no idea what those things are.


The instructions say install GHC 8.10.7.

https://github.com/simplex-chat/simplex-chat/blob/stable/doc...

I suggest running

    ghcup install ghc 8.10.7
    ghcup set ghc 8.10.7
and trying again.

I don't know what android-support is, but from the error message it looks like it doesn't work with GHC 9.x.


Thanks for the hints, I did read the instructions at the URL I mentioned, but had assumed that GHC 9 would be backwards compatible with GHC 8. I have no experience with Haskell.


That's a reasonable assumption. It's a bit more complicated than being "backwards compatible". The android-support package needs to say explicitly that it is compatible with GHC 9.x, but it doesn't, so cabal refuses to try to build it.




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