try-reflex error

~/p/reflex-platform
∴ ./try-reflex
If you have any trouble with this script, please submit an issue at https://github.com/reflex-frp/reflex-platform/issues
Entering the reflex sandbox...
building path(s) ‘/nix/store/8p1h37cb5466p6g2nxyr6pirpg3fr0c5-all-cabal-hashes-2b0bf3ddf8b75656582c1e45c51caa59458cd3ad-src’

trying https://github.com/commercialhaskell/all-cabal-hashes/archive/2b0bf3ddf8b75656582c1e45c51caa59458cd3ad.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   176    0   176    0     0    176      0 --:--:--  0:00:01 --:--:--   128
100 39.7M  100 39.7M    0     0  2259k      0  0:00:18  0:00:18 --:--:-- 3904k
unpacking source archive /private/var/folders/1z/n0jw8fmn0d363tkvqgd3gjc80000gn/T/nix-build-all-cabal-hashes-2b0bf3ddf8b75656582c1e45c51caa59458cd3ad-src.drv-0/2b0bf3ddf8b75656582c1e45c51caa59458cd3ad.tar.gz
output path ‘/nix/store/8p1h37cb5466p6g2nxyr6pirpg3fr0c5-all-cabal-hashes-2b0bf3ddf8b75656582c1e45c51caa59458cd3ad-src’ has r:sha256 hash ‘1940y6kbrfd3zjjz22hwggdndhf780jl5s8vn5c6i6vgi17y9zyh’ when ‘0zph3siy0fswmgnlqhnkjjg2ji98szm3s1aa7gadvgg8cd8b1jrn’ was expected
cannot build derivation ‘/nix/store/s3pnyizaqai1h280ykggzj670hqri4bj-cabal2nix-hashable-1.2.6.1.drv’: 1 dependencies couldn't be built
error: build of ‘/nix/store/s3pnyizaqai1h280ykggzj670hqri4bj-cabal2nix-hashable-1.2.6.1.drv’ failed
(use ‘--show-trace’ to show detailed location information)