--- a/mingwmake.bat	Fri Nov 13 06:40:27 2015 +0100
+++ b/mingwmake.bat	Mon Nov 16 13:33:19 2015 +0000
@@ -4,6 +4,9 @@
 @REM do not edit - automatically generated from ProjectDefinition
 @REM -------
 @SET DEFINES=
+@REM Kludge got Mercurial, cannot be implemented in Borland make
+@FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
+@IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
 
 @pushd ..\rules
 @call find_mingw.bat