(lsp :variables
          default-nix-shell-wrapper
          (lambda (args)
            (append (list "nix-shell" "-I" "." "--command")
                    (list (mapconcat 'identity args " "))))

          default-nix-develop-wrapper
          (lambda (args) (append (list "nix" "develop" "--profile" "dev-profile" "--command" "--") args))

          setup-nix-shell-environment
          '(setq lsp-haskell-process-wrapper-function default-nix-shell-wrapper
                 lsp-haskell-server-wrapper-function default-nix-shell-wrapper
                 haskell-process-wrapper-function default-nix-shell-wrapper)

          setup-nix-develop-environment
          '(setq lsp-haskell-process-wrapper-function default-nix-develop-wrapper
                 lsp-haskell-server-wrapper-function default-nix-develop-wrapper)
          )