diff --git a/BizHawk.Client.EmuHawk/Program.cs b/BizHawk.Client.EmuHawk/Program.cs
index 4458f2ac75..8da6077bbf 100644
--- a/BizHawk.Client.EmuHawk/Program.cs
+++ b/BizHawk.Client.EmuHawk/Program.cs
@@ -96,7 +96,8 @@ namespace BizHawk.Client.EmuHawk
 			// this check has to be done VERY early.  i stepped through a debug build with wrong .dll versions purposely used,
 			// and there was a TypeLoadException before the first line of SubMain was reached (some static ColorType init?)
 			// zero 25-dec-2012 - only do for public builds. its annoying during development
-			if (!VersionInfo.DeveloperBuild)
+			// and don't bother when installed from a package manager i.e. not Windows --yoshi
+			if (!VersionInfo.DeveloperBuild && EXE_PROJECT.OSTailoredCode.CurrentOS == EXE_PROJECT.OSTailoredCode.DistinctOS.Windows)
 			{
 				var thisversion = typeof(Program).Assembly.GetName().Version;
 				var utilversion = Assembly.Load(new AssemblyName("Bizhawk.Client.Common")).GetName().Version;