Test that building hashable works

.github/scripts/env.sh

@@ -12,7 +12,7 @@ fi
 export PATH="$HOME/.local/bin:$PATH"
 
 export BOOTSTRAP_HASKELL_NONINTERACTIVE=1
-export BOOTSTRAP_HASKELL_CABAL_VERSION="${CABAL_VER:-3.6.2.0}"
+export BOOTSTRAP_HASKELL_CABAL_VERSION="${CABAL_VER:-3.6.2.0-p2}"
 export BOOTSTRAP_HASKELL_ADJUST_CABAL_CONFIG=no
 export BOOTSTRAP_HASKELL_INSTALL_NO_STACK=yes
 export BOOTSTRAP_HASKELL_ADJUST_BASHRC=1

.github/workflows/install-bindist.sh

@@ -109,6 +109,8 @@ case $TOOL in
 		cabal --version
 		cabal update
 		cabal install --lib --package-env=. clock
+        # https://github.com/haskell/ghcup-hs/issues/966
+		cabal install --lib --package-env=. hashable
 		;;
     cabal)
 		ghcup_fun install ghc --set "$(ghcup_fun list -t ghc -r -c available | tail -1 | awk '{ print $2 }')"