How to use `serde::format_description` with `format_description::well_known` ?

[loganmzz]

I wanna map "non-offset" strings against OffsetDatetime.

I tried (sorry not provided Rust Playground links, but seems it lacks some features):

use time;
time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);

But I get following errors:

error: expected one of `::`, `;`, or `as`, found `.`
 --> konfetti-sessionize/src/lib.rs:2:111
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  |                                                                                                               ^ expected one of `::`, `;`, or `as`

error: macro expansion ignores token `}` and any following
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ caused by the macro expansion here
  |
  = note: the usage of `time::serde::format_description!` is likely invalid in item context

error[E0433]: failed to resolve: there are too many leading `super` keywords
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ there are too many leading `super` keywords
  |
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0432]: unresolved import `super`
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `description` in the root
  |
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: use of undeclared crate or module `__path_hack`
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `__path_hack`
  |
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0412]: cannot find type `__TimeSerdeType` in this scope
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
  |
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find function `description` in this scope
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
  |
note: function `crate::serde_datetime::description` exists but is inaccessible
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not accessible
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: use of undeclared crate or module `__TimeSerdeType`
 --> konfetti-sessionize/src/lib.rs:2:1
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601.DATE_TIME);
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `__TimeSerdeType`
  |
  = note: this error originates in the macro `time::serde::format_description` (in Nightly builds, run with -Z macro-backtrace for more info)

Trying to replace Iso8601.DATE_TIME with Iso8601::DATE_TIME, blocks macro evaluation:

error[E0432]: unresolved import `time::format_description::well_known::Iso8601`
 --> konfetti-sessionize/src/lib.rs:2:104
  |
2 | time::serde::format_description!(serde_datetime, OffsetDateTime, time::format_description::well_known::Iso8601::DATE_TIME);
  |                                                                                                        ^^^^^^^ `Iso8601` is a struct, not a module