"Could not read the output of 'nix-prefetch-url'. This is a bug."
TheOddler opened this issue · comments
When trying out Niv and following the example from the readme to add GHC:
$ niv add ghc \
-v 8.4.3 \
-t 'https://downloads.haskell.org/~ghc/<version>/ghc-<version>-i386-deb8-linux.tar.xz'
But instead using the latest ghc version (9.0.1 as of writing), I get the following error:
$ niv add ghc -v 9.0.1 -t 'https://downloads.haskell.org/~ghc/<version>/ghc-<version>-i386-deb8-linux.tar.xz'
Adding package ghc
FATAL: Could not read the output of 'nix-prefetch-url'. This is a bug. Please create a
ticket:
https://github.com/nmattia/niv/issues/new
Thanks! I'll buy you a beer.
command:
nix-prefetch-urlhttps://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-i386-deb8-linux.tar.xz --name ghc-9.0.1-i386-deb8-linux.tar.xz
stdout:
stderr:
error: unable to download 'https://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-i386-deb8-linux.tar.xz': HTTP error 404
FATAL: One or more packages failed to update:
ghc: ExitFailure 1
ERROR: ExitFailure 1
The solution is quite simple, simply change deb8
to deb9
, as no deb8
file exists. However, the error asked me to post this so I did.
The command that does work:
niv add ghc -v 9.0.1 -t 'https://downloads.haskell.org/~ghc/<version>/ghc-<version>-i386-deb9-linux.tar.xz'
I got the same problem when I tried version 8.10.6, for the same reason and with same fix.
@TheOddler Right, the file https://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-i386-deb8-linux.tar.xz
indeed doesn't exit. The error message is a bit dramatic though, it's not really a bug, but a 404.
@nmattia I thought so too that it's not really a bug. Well, maybe it's a bug that the code thinks that it's a bug.