diff --git a/build.xml b/build.xml
index fc077552..7a4efeb6 100644
--- a/build.xml
+++ b/build.xml
@@ -18,31 +18,19 @@
 	</target>
 	
 	<target name="recompile">
-		<exec dir="${dir.development}\mcp" executable="cmd" os="Windows 7">
+		<exec dir="${dir.development}\mcp" executable="cmd" osfamily="windows">
 			<arg line="/c recompile.bat" />
 		</exec>
-		<exec dir="${dir.development}\mcp" executable="cmd" os="Windows 8">
-			<arg line="/c recompile.bat" />
-		</exec>
-		<exec dir="${dir.development}\mcp" executable="bash" os="Linux">
-			<arg line="recompile.sh" />
-		</exec>
-		<exec dir="${dir.development}\mcp" executable="bash" os="Mac OS X">
+		<exec dir="${dir.development}\mcp" executable="bash" osfamily="unix">
 			<arg line="recompile.sh" />
 		</exec>
 	</target>
 	
 	<target name="reobfuscate">
-		<exec dir="${dir.development}\mcp" executable="cmd" os="Windows 7">
+		<exec dir="${dir.development}\mcp" executable="cmd" osfamily="windows">
 			<arg line="/c reobfuscate_srg.bat" />
 		</exec>
-		<exec dir="${dir.development}\mcp" executable="cmd" os="Windows 8">
-			<arg line="/c reobfuscate_srg.bat" />
-		</exec>
-		<exec dir="${dir.development}\mcp" executable="bash" os="Linux">
-			<arg line="reobfuscate_srg.sh" />
-		</exec>
-		<exec dir="${dir.development}\mcp" executable="bash" os="Mac OS X">
+		<exec dir="${dir.development}\mcp" executable="bash" osfamily="unix">
 			<arg line="reobfuscate_srg.sh" />
 		</exec>
 	</target>
@@ -87,4 +75,4 @@
 		<!-- Clean up the MCP source now that we are done -->
 		<antcall target="clean" />
 	</target>
-</project>
\ No newline at end of file
+</project>