Append ghcup binary directory to PATH instead of prepending

Fixes #118 (closed)

bootstrap-haskell

@@ -132,7 +132,7 @@ download_ghcup() {
 
   edo mkdir -p "${GHCUP_DIR}"
 	cat <<-EOF > "${GHCUP_DIR}"/env || die "Failed to create env file"
-		export PATH="\$HOME/.cabal/bin:${GHCUP_BIN}:\$PATH"
+		export PATH="\$PATH:\$HOME/.cabal/bin:${GHCUP_BIN}"
 		EOF
 	# shellcheck disable=SC1090
     edo . "${GHCUP_DIR}"/env