Try to search for binary on macOS/Cabal3

.compile_binaries

@@ -66,9 +66,14 @@ build_osx() {
   cabal update
   cabal install --dependencies-only
   cabal build shellcheck
+
+  # Cabal 3 no longer has a predictable output path
+  path="$(find . -name 'shellcheck' -type f -perm +111)"
+  [[ -e "$path" ]]
+
   for tag in $TAGS
   do 
-    cp "dist/build/shellcheck/shellcheck" "deploy/shellcheck-$tag.darwin-x86_64";
+    cp "$path" "deploy/shellcheck-$tag.darwin-x86_64";
   done
 }