Windows issue - layout_vars.nim: type mismatch
I am having this issue in Windows.
```nim
C:\Users\xxxxx\.nimble\pkgs\nimx-#head\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))
```