--- a/bmake.bat	Tue Feb 16 06:42:24 2016 +0100
+++ b/bmake.bat	Thu Feb 18 23:49:44 2016 +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%"
 
 make.exe -N -f bc.mak  %DEFINES% %*