treewide: Make explicit that 'dev' output of readline is used

+1 -1
+1 -1
pkgs/tools/networking/lftp/default.nix
··· 15 buildInputs = [ gnutls readline zlib libidn ]; 16 17 configureFlags = [ 18 - "--with-readline=${readline}" 19 ]; 20 21 meta = with stdenv.lib; {
··· 15 buildInputs = [ gnutls readline zlib libidn ]; 16 17 configureFlags = [ 18 + "--with-readline=${readline.dev}" 19 ]; 20 21 meta = with stdenv.lib; {