---
Γ := rules "expr"
  expr := rules "expr_function"
    expr_function := rules "{" "formals" "}" ":" "expr_function"
      { := lexemes "{"
        { "{" (1, 1)
      formals := rules "formal" "," "formals"
        formal := rules "ID"
          ID := lexemes "ID"
            ID "lib" (1, 3)
        , := lexemes ","
          , "," (1, 6)
        formals := rules "formal" "," "formals"
          formal := rules "ID"
            ID := lexemes "ID"
              ID "stdenv" (1, 8)
          , := lexemes ","
            , "," (1, 14)
          formals := rules "formal"
            formal := rules "ID"
              ID := lexemes "ID"
                ID "fetchurl" (1, 16)
      } := lexemes "}"
        } "}" (1, 25)
      : := lexemes ":"
        : ":" (1, 26)
      expr_function := rules "expr_if"
        expr_if := rules "expr_op"
          expr_op := rules "expr_app"
            expr_app := rules "expr_app" "expr_select"
              expr_app := rules "expr_select"
                expr_select := rules "expr_simple" "." "attrpath"
                  expr_simple := rules "ID"
                    ID := lexemes "ID"
                      ID "stdenv" (3, 1)
                  . := lexemes "."
                    . "." (3, 7)
                  attrpath := rules "attr"
                    attr := rules "ID"
                      ID := lexemes "ID"
                        ID "mkDerivation" (3, 8)
              expr_select := rules "expr_simple"
                expr_simple := rules "REC" "{" "binds" "}"
                  REC := lexemes "REC"
                    REC "rec" (3, 21)
                  { := lexemes "{"
                    { "{" (3, 25)
                  binds := rules "binds" "attrpath" "=" "expr" ";"
                    binds := rules "binds" "attrpath" "=" "expr" ";"
                      binds := rules "binds" "attrpath" "=" "expr" ";"
                        binds := rules "binds" "attrpath" "=" "expr" ";"
                          binds := rules "binds" "attrpath" "=" "expr" ";"
                            binds := rules "binds" "attrpath" "=" "expr" ";"
                              binds := rules "binds" "attrpath" "=" "expr" ";"
                                binds := rules 
                                attrpath := rules "attr"
                                  attr := rules "ID"
                                    ID := lexemes "ID"
                                      ID "pname" (4, 3)
                                = := lexemes "="
                                  = "=" (4, 9)
                                expr := rules "expr_function"
                                  expr_function := rules "expr_if"
                                    expr_if := rules "expr_op"
                                      expr_op := rules "expr_app"
                                        expr_app := rules "expr_select"
                                          expr_select := rules "expr_simple"
                                            expr_simple := rules "\"" "string_parts" "\""
                                              " := lexemes "\""
                                                " "\"" (4, 11)
                                              string_parts := rules "STR"
                                                STR := lexemes "STR"
                                                  STR "mtools" (4, 12)
                                              " := lexemes "\""
                                                " "\"" (4, 18)
                                ; := lexemes ";"
                                  ; ";" (4, 19)
                              attrpath := rules "attr"
                                attr := rules "ID"
                                  ID := lexemes "ID"
                                    ID "version" (5, 3)
                              = := lexemes "="
                                = "=" (5, 11)
                              expr := rules "expr_function"
                                expr_function := rules "expr_if"
                                  expr_if := rules "expr_op"
                                    expr_op := rules "expr_app"
                                      expr_app := rules "expr_select"
                                        expr_select := rules "expr_simple"
                                          expr_simple := rules "\"" "string_parts" "\""
                                            " := lexemes "\""
                                              " "\"" (5, 13)
                                            string_parts := rules "STR"
                                              STR := lexemes "STR"
                                                STR "4.0.38" (5, 14)
                                            " := lexemes "\""
                                              " "\"" (5, 20)
                              ; := lexemes ";"
                                ; ";" (5, 21)
                            attrpath := rules "attr"
                              attr := rules "ID"
                                ID := lexemes "ID"
                                  ID "src" (7, 3)
                            = := lexemes "="
                              = "=" (7, 7)
                            expr := rules "expr_function"
                              expr_function := rules "expr_if"
                                expr_if := rules "expr_op"
                                  expr_op := rules "expr_app"
                                    expr_app := rules "expr_app" "expr_select"
                                      expr_app := rules "expr_select"
                                        expr_select := rules "expr_simple"
                                          expr_simple := rules "ID"
                                            ID := lexemes "ID"
                                              ID "fetchurl" (7, 9)
                                      expr_select := rules "expr_simple"
                                        expr_simple := rules "{" "binds" "}"
                                          { := lexemes "{"
                                            { "{" (7, 18)
                                          binds := rules "binds" "attrpath" "=" "expr" ";"
                                            binds := rules "binds" "attrpath" "=" "expr" ";"
                                              binds := rules 
                                              attrpath := rules "attr"
                                                attr := rules "ID"
                                                  ID := lexemes "ID"
                                                    ID "url" (8, 5)
                                              = := lexemes "="
                                                = "=" (8, 9)
                                              expr := rules "expr_function"
                                                expr_function := rules "expr_if"
                                                  expr_if := rules "expr_op"
                                                    expr_op := rules "expr_app"
                                                      expr_app := rules "expr_select"
                                                        expr_select := rules "expr_simple"
                                                          expr_simple := rules "\"" "string_parts" "\""
                                                            " := lexemes "\""
                                                              " "\"" (8, 11)
                                                            string_parts := rules "string_parts_interpolated"
                                                              string_parts_interpolated := rules "string_parts_interpolated" "STR"
                                                                string_parts_interpolated := rules "string_parts_interpolated" "DOLLAR_CURLY" "expr" "}"
                                                                  string_parts_interpolated := rules "string_parts_interpolated" "STR"
                                                                    string_parts_interpolated := rules "STR" "DOLLAR_CURLY" "expr" "}"
                                                                      STR := lexemes "STR"
                                                                        STR "mirror://gnu/mtools/" (8, 12)
                                                                      DOLLAR_CURLY := lexemes "DOLLAR_CURLY"
                                                                        DOLLAR_CURLY "${" (8, 32)
                                                                      expr := rules "expr_function"
                                                                        expr_function := rules "expr_if"
                                                                          expr_if := rules "expr_op"
                                                                            expr_op := rules "expr_app"
                                                                              expr_app := rules "expr_select"
                                                                                expr_select := rules "expr_simple"
                                                                                  expr_simple := rules "ID"
                                                                                    ID := lexemes "ID"
                                                                                      ID "pname" (8, 34)
                                                                      } := lexemes "}"
                                                                        } "}" (8, 39)
                                                                    STR := lexemes "STR"
                                                                      STR "-" (8, 40)
                                                                  DOLLAR_CURLY := lexemes "DOLLAR_CURLY"
                                                                    DOLLAR_CURLY "${" (8, 41)
                                                                  expr := rules "expr_function"
                                                                    expr_function := rules "expr_if"
                                                                      expr_if := rules "expr_op"
                                                                        expr_op := rules "expr_app"
                                                                          expr_app := rules "expr_select"
                                                                            expr_select := rules "expr_simple"
                                                                              expr_simple := rules "ID"
                                                                                ID := lexemes "ID"
                                                                                  ID "version" (8, 43)
                                                                  } := lexemes "}"
                                                                    } "}" (8, 50)
                                                                STR := lexemes "STR"
                                                                  STR ".tar.bz2" (8, 51)
                                                            " := lexemes "\""
                                                              " "\"" (8, 59)
                                              ; := lexemes ";"
                                                ; ";" (8, 60)
                                            attrpath := rules "attr"
                                              attr := rules "ID"
                                                ID := lexemes "ID"
                                                  ID "sha256" (9, 5)
                                            = := lexemes "="
                                              = "=" (9, 12)
                                            expr := rules "expr_function"
                                              expr_function := rules "expr_if"
                                                expr_if := rules "expr_op"
                                                  expr_op := rules "expr_app"
                                                    expr_app := rules "expr_select"
                                                      expr_select := rules "expr_simple"
                                                        expr_simple := rules "\"" "string_parts" "\""
                                                          " := lexemes "\""
                                                            " "\"" (9, 14)
                                                          string_parts := rules "STR"
                                                            STR := lexemes "STR"
                                                              STR "sha256-e5RIX0huffCMymiwChZKE8049MY8uGhNGIdZ7nvF5yk=" (9, 15)
                                                          " := lexemes "\""
                                                            " "\"" (9, 66)
                                            ; := lexemes ";"
                                              ; ";" (9, 67)
                                          } := lexemes "}"
                                            } "}" (10, 3)
                            ; := lexemes ";"
                              ; ";" (10, 4)
                          attrpath := rules "attr"
                            attr := rules "ID"
                              ID := lexemes "ID"
                                ID "patches" (12, 3)
                          = := lexemes "="
                            = "=" (12, 11)
                          expr := rules "expr_function"
                            expr_function := rules "expr_if"
                              expr_if := rules "expr_op"
                                expr_op := rules "expr_app"
                                  expr_app := rules "expr_app" "expr_select"
                                    expr_app := rules "expr_app" "expr_select"
                                      expr_app := rules "expr_select"
                                        expr_select := rules "expr_simple" "." "attrpath"
                                          expr_simple := rules "ID"
                                            ID := lexemes "ID"
                                              ID "lib" (12, 13)
                                          . := lexemes "."
                                            . "." (12, 16)
                                          attrpath := rules "attr"
                                            attr := rules "ID"
                                              ID := lexemes "ID"
                                                ID "optional" (12, 17)
                                      expr_select := rules "expr_simple" "." "attrpath"
                                        expr_simple := rules "ID"
                                          ID := lexemes "ID"
                                            ID "stdenv" (12, 26)
                                        . := lexemes "."
                                          . "." (12, 32)
                                        attrpath := rules "attr"
                                          attr := rules "ID"
                                            ID := lexemes "ID"
                                              ID "isDarwin" (12, 33)
                                    expr_select := rules "expr_simple"
                                      expr_simple := rules "path_start" "PATH_END"
                                        path_start := rules "PATH"
                                          PATH := lexemes "PATH"
                                            PATH "./UNUSED-darwin.patch" (12, 42)
                                        PATH_END := lexemes "PATH_END"
                                          PATH_END ";" (12, 63)
                          ; := lexemes ";"
                            ; ";" (12, 63)
                        attrpath := rules "attr"
                          attr := rules "ID"
                            ID := lexemes "ID"
                              ID "configureFlags" (15, 3)
                        = := lexemes "="
                          = "=" (15, 18)
                        expr := rules "expr_function"
                          expr_function := rules "expr_if"
                            expr_if := rules "expr_op"
                              expr_op := rules "expr_app"
                                expr_app := rules "expr_app" "expr_select"
                                  expr_app := rules "expr_app" "expr_select"
                                    expr_app := rules "expr_select"
                                      expr_select := rules "expr_simple" "." "attrpath"
                                        expr_simple := rules "ID"
                                          ID := lexemes "ID"
                                            ID "lib" (15, 20)
                                        . := lexemes "."
                                          . "." (15, 23)
                                        attrpath := rules "attr"
                                          attr := rules "ID"
                                            ID := lexemes "ID"
                                              ID "optional" (15, 24)
                                    expr_select := rules "expr_simple" "." "attrpath"
                                      expr_simple := rules "ID"
                                        ID := lexemes "ID"
                                          ID "stdenv" (15, 33)
                                      . := lexemes "."
                                        . "." (15, 39)
                                      attrpath := rules "attr"
                                        attr := rules "ID"
                                          ID := lexemes "ID"
                                            ID "isDarwin" (15, 40)
                                  expr_select := rules "expr_simple"
                                    expr_simple := rules "\"" "string_parts" "\""
                                      " := lexemes "\""
                                        " "\"" (15, 49)
                                      string_parts := rules "STR"
                                        STR := lexemes "STR"
                                          STR "--without-x" (15, 50)
                                      " := lexemes "\""
                                        " "\"" (15, 61)
                        ; := lexemes ";"
                          ; ";" (15, 62)
                      attrpath := rules "attr"
                        attr := rules "ID"
                          ID := lexemes "ID"
                            ID "doCheck" (17, 3)
                      = := lexemes "="
                        = "=" (17, 11)
                      expr := rules "expr_function"
                        expr_function := rules "expr_if"
                          expr_if := rules "expr_op"
                            expr_op := rules "expr_app"
                              expr_app := rules "expr_select"
                                expr_select := rules "expr_simple"
                                  expr_simple := rules "ID"
                                    ID := lexemes "ID"
                                      ID "true" (17, 13)
                      ; := lexemes ";"
                        ; ";" (17, 17)
                    attrpath := rules "attr"
                      attr := rules "ID"
                        ID := lexemes "ID"
                          ID "meta" (19, 3)
                    = := lexemes "="
                      = "=" (19, 8)
                    expr := rules "expr_function"
                      expr_function := rules "WITH" "expr" ";" "expr_function"
                        WITH := lexemes "WITH"
                          WITH "with" (19, 10)
                        expr := rules "expr_function"
                          expr_function := rules "expr_if"
                            expr_if := rules "expr_op"
                              expr_op := rules "expr_app"
                                expr_app := rules "expr_select"
                                  expr_select := rules "expr_simple"
                                    expr_simple := rules "ID"
                                      ID := lexemes "ID"
                                        ID "lib" (19, 15)
                        ; := lexemes ";"
                          ; ";" (19, 18)
                        expr_function := rules "expr_if"
                          expr_if := rules "expr_op"
                            expr_op := rules "expr_app"
                              expr_app := rules "expr_select"
                                expr_select := rules "expr_simple"
                                  expr_simple := rules "{" "binds" "}"
                                    { := lexemes "{"
                                      { "{" (19, 20)
                                    binds := rules "binds" "attrpath" "=" "expr" ";"
                                      binds := rules "binds" "attrpath" "=" "expr" ";"
                                        binds := rules "binds" "attrpath" "=" "expr" ";"
                                          binds := rules "binds" "attrpath" "=" "expr" ";"
                                            binds := rules 
                                            attrpath := rules "attr"
                                              attr := rules "ID"
                                                ID := lexemes "ID"
                                                  ID "homepage" (20, 5)
                                            = := lexemes "="
                                              = "=" (20, 14)
                                            expr := rules "expr_function"
                                              expr_function := rules "expr_if"
                                                expr_if := rules "expr_op"
                                                  expr_op := rules "expr_app"
                                                    expr_app := rules "expr_select"
                                                      expr_select := rules "expr_simple"
                                                        expr_simple := rules "\"" "string_parts" "\""
                                                          " := lexemes "\""
                                                            " "\"" (20, 16)
                                                          string_parts := rules "STR"
                                                            STR := lexemes "STR"
                                                              STR "https://www.gnu.org/software/mtools/" (20, 17)
                                                          " := lexemes "\""
                                                            " "\"" (20, 53)
                                            ; := lexemes ";"
                                              ; ";" (20, 54)
                                          attrpath := rules "attr"
                                            attr := rules "ID"
                                              ID := lexemes "ID"
                                                ID "description" (21, 5)
                                          = := lexemes "="
                                            = "=" (21, 17)
                                          expr := rules "expr_function"
                                            expr_function := rules "expr_if"
                                              expr_if := rules "expr_op"
                                                expr_op := rules "expr_app"
                                                  expr_app := rules "expr_select"
                                                    expr_select := rules "expr_simple"
                                                      expr_simple := rules "\"" "string_parts" "\""
                                                        " := lexemes "\""
                                                          " "\"" (21, 19)
                                                        string_parts := rules "STR"
                                                          STR := lexemes "STR"
                                                            STR "Utilities to access MS-DOS disks" (21, 20)
                                                        " := lexemes "\""
                                                          " "\"" (21, 52)
                                          ; := lexemes ";"
                                            ; ";" (21, 53)
                                        attrpath := rules "attr"
                                          attr := rules "ID"
                                            ID := lexemes "ID"
                                              ID "platforms" (22, 5)
                                        = := lexemes "="
                                          = "=" (22, 15)
                                        expr := rules "expr_function"
                                          expr_function := rules "expr_if"
                                            expr_if := rules "expr_op"
                                              expr_op := rules "expr_app"
                                                expr_app := rules "expr_select"
                                                  expr_select := rules "expr_simple" "." "attrpath"
                                                    expr_simple := rules "ID"
                                                      ID := lexemes "ID"
                                                        ID "platforms" (22, 17)
                                                    . := lexemes "."
                                                      . "." (22, 26)
                                                    attrpath := rules "attr"
                                                      attr := rules "ID"
                                                        ID := lexemes "ID"
                                                          ID "unix" (22, 27)
                                        ; := lexemes ";"
                                          ; ";" (22, 31)
                                      attrpath := rules "attr"
                                        attr := rules "ID"
                                          ID := lexemes "ID"
                                            ID "license" (23, 5)
                                      = := lexemes "="
                                        = "=" (23, 13)
                                      expr := rules "expr_function"
                                        expr_function := rules "expr_if"
                                          expr_if := rules "expr_op"
                                            expr_op := rules "expr_app"
                                              expr_app := rules "expr_select"
                                                expr_select := rules "expr_simple" "." "attrpath"
                                                  expr_simple := rules "ID"
                                                    ID := lexemes "ID"
                                                      ID "licenses" (23, 15)
                                                  . := lexemes "."
                                                    . "." (23, 23)
                                                  attrpath := rules "attr"
                                                    attr := rules "ID"
                                                      ID := lexemes "ID"
                                                        ID "gpl3" (23, 24)
                                      ; := lexemes ";"
                                        ; ";" (23, 28)
                                    } := lexemes "}"
                                      } "}" (24, 3)
                    ; := lexemes ";"
                      ; ";" (24, 4)
                  } := lexemes "}"
                    } "}" (25, 1)