diff --git a/BUILDING.md b/BUILDING.md
index d8deeeb237..24ca4b52fc 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -10,29 +10,22 @@ Steps:
 # Building on Linux
 
 Prereqs:
-*	Mono >= 2.4.3
-*	Nant >= 0.85
+*	Mono > 5.0
 *	On some Linux distributions you may need to install additional packages.
 	See http://opensimulator.org/wiki/Dependencies for more information.
-*	May also use xbuild (included in mono distributions)
-*	May use Monodevelop, a cross-platform IDE
+	msbuild or xbuild if still supported by mono version
 
 From the distribution type:
  * ./runprebuild.sh
- * nant (or !* xbuild)
+ * type msbuild or xbuild)
  * cd bin 
  * copy OpenSim.ini.example to OpenSim.ini and other appropriate files in bin/config-include
- * run mono OpenSim.exe
- !* xbuild option switches
- !*          clean:  xbuild /target:clean
- !*          debug: (default) xbuild /property:Configuration=Debug
- !*          release: xbuild /property:Configuration=Release
-
-# Using Monodevelop
-
-From the distribution type:
- * ./runprebuild.sh
- * type monodevelop OpenSim.sln
+ * windoes: execute opensim.exe or opensim32.exe for small regions
+ * linux: run ./opensim.sh
+ !* msbuild (xbuild) option switches
+ !*          clean:  msbuild /target:clean
+ !*          debug: (default) msbuild /property:Configuration=Debug
+ !*          release: msbuild /property:Configuration=Release
 
 # References