Fix CI

Author: hasufell

.github/workflows/ci.yml

@@ -91,5 +91,5 @@ jobs:
       - name: Run build (32 bit linux)
         uses: docker://hasufell/i386-alpine-haskell:3.12
         with:
-          args: sh -c "apk add gettext gettext-dev autoconf automake libtool && cabal update && autoreconf -i && cabal build"
+          args: sh -c "ghcup install cabal --isolate=/usr/bin latest --force && apk add gettext gettext-dev autoconf automake libtool && cabal update && autoreconf -i && cabal build"