Eth2.0-specs: PoW chain contract does not compile in the latest version of Vyper

[dangerousfood]

Compilation of the PoW chain contract must be done using using v0.1.0-beta.4. Compilation in the latest version v0.1.0-beta.5 results in the following error:

vyper-0.1.0b5-py3.7.egg/vyper/types/types.py:328: DeprecationWarning: Mapping definitions using subscript have deprecated (see VIP564). Use map(type1, type2) instead.
Error compiling: vrc.vy
vyper.exceptions.InvalidTypeException: line 11: Unknown list type.
receipt_tree: bytes32[uint256]
--------------^

[djrtwo]

Tried to change the line to receipt_tree: map(uint256, bytes32) but am getting the following error

vyper.exceptions.StructureException: map expects one arg (the type)

Pinged the vyper guys in gitter and am awaiting a response.

[djrtwo]

apparently it was a bug in v0.1.0-beta.5 that has already been fixed in master. Should be fixed in next release

[djrtwo]

Made vyper version explicit in the spec. Will update when next release

[realisation]

This is erroring out for me on v0.1.0b10

[jishankai]

This is erroring out for me on v0.1.0b10

How did you solve this? I have the same issue with this version.