ugly_macro.nim

const nimStackTraceOverride {.strdefine.} = ""
when defined(nimStackTraceOverride):
  import macros
  macro importModuleFromString(s: static[string]): untyped =
    if s == "true":
      # empty command line definition
      error("You need to specify the module's name with `-d:nimStackTraceOverride=yourModuleHere`")
    result = newNimNode(nnkImportStmt).add(newIdentNode(s))
  importModuleFromString(nimStackTraceOverride)