Error building on MacOSX [error layout_vars.nim]
`Compiling nakefile...
No task specified, running default task defined by nakefile.
Hint: used config file '/Users/.choosenim/toolchains/nim-#devel/config/nim.cfg' [Conf]
Hint: used config file '/Users/.choosenim/toolchains/nim-#devel/config/config.nims' [Conf]
...................................................................................
/Users/.nimble/pkgs/async_http_request-0.1.2/async_http_request.nim(125, 34) template/generic instantiation of `request` from here
/Users/.choosenim/toolchains/nim-#devel/lib/pure/httpclient.nim(1058, 14) Warning: Deprecated since v1.5; use HttpMethod enum instead; string parameter httpMethod is deprecated [User]
...................................
/Users/.nimble/pkgs/nimx-0.1/nimx/layout_vars.nim(19, 32) Error: type mismatch: got <Variable>
but expected one of: 
proc newExpression(constant: float = 0): Expression
  first type mismatch at position: 1
  required type for constant: float
  but expression 'left(phs)' is of type: Variable
proc newExpression(term: Term; constant: float = 0): Expression
  first type mismatch at position: 1
  required type for term: Term
  but expression 'left(phs)' is of type: Variable
proc newExpression(terms: seq[Term]; constant: float = 0): Expression
  first type mismatch at position: 1
  required type for terms: seq[Term]
  but expression 'left(phs)' is of type: Variable

expression: newExpression(left(phs))`

I tracked down layout_vars.nim 

line 13,22 

![image](https://user-images.githubusercontent.com/3707258/108769355-807bd580-751e-11eb-831d-4ccb6742e00f.png)

I don't see a -newExpression in kiwi either 
https://github.com/yglukhov/kiwi/blob/master/kiwi/expression.nim

Let me know what I can do to help out , if needed

