diff --git a/AMBuildScript b/AMBuildScript
index 10f0814..a689c86 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -1,6 +1,7 @@
 # vim: set sts=2 ts=8 sw=2 tw=99 et ft=python:
 import os, sys
 import traceback
+import subprocess
 
 class SDK(object):
   def __init__(self, sdk, ext, aDef, name, platform, dir):
@@ -184,6 +185,13 @@ class ExtensionConfig(object):
       raise Exception('Could not find a source copy of Metamod:Source')
     self.mms_root = Normalize(self.mms_root)
 
+    # Run protobuf compilation and copy files to corresponding folders
+    if 'csgo' in self.sdks:
+      os.chdir("../pb/")
+      os.chmod('./build_protobuf.sh', 0o755)
+      subprocess.call("./build_protobuf.sh")
+
+
   def configure(self):
     if not set(self.target_archs).issubset(['x86', 'x86_64']):
       raise Exception('Unknown target architecture: {0}'.format(self.target_archs))
@@ -207,7 +215,7 @@ class ExtensionConfig(object):
     elif cxx.family == 'msvc':
       self.configure_msvc(cxx)
 
-    # Optimizaiton
+    # Optimization
     if builder.options.opt == '1':
       cxx.defines += ['NDEBUG']
 
diff --git a/AMBuilder b/AMBuilder
index 1d1e7f7..04c364f 100644
--- a/AMBuilder
+++ b/AMBuilder
@@ -23,24 +23,9 @@ for cxx in builder.targets:
       binary.compiler.cflags += ['-Wno-deprecated-declarations']
       binary.compiler.postlink += ['-framework', 'CoreServices']
 
-    # if cxx.family == 'gcc' or cxx.family == 'clang':
-    #   binary.compiler.cxxflags += ['-fno-rtti']
-    # elif cxx.family == 'msvc':
-    #   binary.compiler.cxxflags += ['/GR-']
-
-    binary.compiler.cxxincludes += [
-      os.path.join(builder.sourcePath, 'pb', 'include'),
-    ]
-    binary.compiler.postlink += [
-      '-L' + os.path.join(builder.sourcePath, 'pb', 'lib'),
-      '-lprotobuf'
-    ]
-
     binary.sources += [
       'extension.cpp',
       'ringbuffer.cpp',
-      os.path.join(builder.sourcePath, 'pb', 'csgo', 'netmessages.pb.cc'),
-      # os.path.join(builder.sourcePath, 'pb', 'google', 'protobuf', 'descriptor.pb.cc'),
       os.path.join(SM.sm_root, 'extensions', 'sm-ext-common', 'mathstubs.c'),
       os.path.join(SM.sm_root, 'public', 'smsdk_ext.cpp'),
       os.path.join(SM.sm_root, 'public', 'CDetour', 'detours.cpp'),
@@ -53,6 +38,19 @@ for cxx in builder.targets:
       os.path.join(SM.sm_root, 'public', 'libudis86', 'udis86.c'),
     ]
 
+    if sdk.name in ['csgo']:
+      binary.compiler.cxxincludes += [
+        os.path.join(builder.sourcePath, 'pb', 'include'),
+      ]
+      binary.compiler.postlink += [
+        '-L' + os.path.join(builder.sourcePath, 'pb', 'lib'),
+        '-lprotobuf'
+      ]
+
+      binary.sources += [
+        os.path.join(builder.sourcePath, 'pb', 'csgo', 'netmessages.pb.cc'),
+      ]
+
     binary.compiler.cxxincludes += [
       os.path.join(builder.sourcePath, 'celt')
     ]
diff --git a/configure.py b/configure.py
index 6b1fb56..2804d35 100755
--- a/configure.py
+++ b/configure.py
@@ -1,7 +1,5 @@
 # vim: set ts=2 sw=2 tw=99 noet:
 import sys
-import os
-import subprocess
 try:
 	from ambuild2 import run, util
 except:
@@ -39,8 +37,3 @@ parser.options.add_argument('--targets', type=str, dest='targets', default=None,
 		                      help="Override the target architecture (use commas to separate multiple targets).")
 
 parser.Configure()
-
-# Run protobuf compilation and copy files to corresponding folders
-os.chdir("../pb/")
-os.chmod('./build_protobuf.sh', 0o755)
-subprocess.call("./build_protobuf.sh")
diff --git a/extension.cpp b/extension.cpp
index 5f205de..ba88db7 100644
--- a/extension.cpp
+++ b/extension.cpp
@@ -153,6 +153,7 @@ std::string hex_to_string(const std::string& input)
     return output;
 }
 
+#if SOURCE_ENGINE == SE_CSGO || SOURCE_ENGINE == SE_INSURGENCY
 void PrintCCLCMsg_VoiceData(const char *funcName, int client, const CCLCMsg_VoiceData &msg, bool drop)
 {
 	g_pSM->LogMessage(myself, "===START=======%s=============", funcName);
@@ -193,6 +194,7 @@ DETOUR_DECL_STATIC3(SV_BroadcastVoiceData_CSGO, int, IClient *, pClient, const C
 	// bool CGameClient::CLCMsg_VoiceData( const CCLCMsg_VoiceData& msg ) so wtf ???
 	return 1;
 }
+#endif
 
 DETOUR_DECL_STATIC4(SV_BroadcastVoiceData, void, IClient *, pClient, int, nBytes, char *, data, int64, xuid)
 {
diff --git a/extension.h b/extension.h
index 89445e3..cda2734 100644
--- a/extension.h
+++ b/extension.h
@@ -36,7 +36,10 @@
 #include "smsdk_ext.h"
 #include "celt_header.h"
 #include "ringbuffer.h"
+
+#if SOURCE_ENGINE == SE_CSGO || SOURCE_ENGINE == SE_INSURGENCY
 #include "pb/csgo/netmessages.pb.h"
+#endif
 
 /**
  * @file extension.h