diff --git a/AMBuildScript b/AMBuildScript
index e0344911..aa6a9aa1 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -124,7 +124,7 @@ class SMConfig(object):
     cfg = builder.DetectCompilers()
     cxx = cfg.cxx
 
-    if cxx.behavior is 'gcc':
+    if cxx.behavior == 'gcc':
       cfg.defines += [
         'stricmp=strcasecmp',
         '_stricmp=strcasecmp',
@@ -145,8 +145,8 @@ class SMConfig(object):
         '-m32',
       ]
 
-      have_gcc = cxx.name is 'gcc'
-      have_clang = cxx.name is 'clang'
+      have_gcc = cxx.name == 'gcc'
+      have_clang = cxx.name == 'clang'
       if have_clang or (have_gcc and cxx.majorVersion >= 4):
         cfg.cflags += ['-fvisibility=hidden']
         cfg.cxxflags += ['-fvisibility-inlines-hidden']
@@ -364,21 +364,21 @@ class SMConfig(object):
   def HL2Library(self, context, name, sdk):
     compiler = self.HL2Compiler(context, sdk)
 
-    if builder.target_platform is 'linux':
-      if sdk.name is 'ep1':
+    if builder.target_platform == 'linux':
+      if sdk.name == 'ep1':
         lib_folder = os.path.join(sdk.path, 'linux_sdk')
-      elif sdk.name is '2013':
+      elif sdk.name == '2013':
         lib_folder = os.path.join(sdk.path, 'lib', 'public', 'linux32')
       else:
         lib_folder = os.path.join(sdk.path, 'lib', 'linux')
     elif builder.target_platform == 'mac':
-      if sdk.name is '2013':
+      if sdk.name == '2013':
         lib_folder = os.path.join(sdk.path, 'lib', 'public', 'osx32')
       else:
         lib_folder = os.path.join(sdk.path, 'lib', 'mac')
 
     if builder.target_platform in ['linux', 'mac']:
-      if sdk.name is '2013':
+      if sdk.name == '2013':
         compiler.postlink += [
           compiler.Dep(os.path.join(lib_folder, 'tier1.a')),
           compiler.Dep(os.path.join(lib_folder, 'mathlib.a'))
diff --git a/core/AMBuilder b/core/AMBuilder
index 078ccb06..2bf6a564 100644
--- a/core/AMBuilder
+++ b/core/AMBuilder
@@ -8,16 +8,16 @@ for sdk_name in SM.sdks:
   binary = SM.HL2Library(builder, binary_name, sdk)
   compiler = binary.compiler
 
-  if sdk.name is 'csgo':
+  if sdk.name == 'csgo':
     # Protobuf 2.3 headers have some signed/unsigned compares. I believe that it's fixed in later versions, but Valve.
-    if compiler.cxx.behavior is 'gcc':
+    if compiler.cxx.behavior == 'gcc':
       compiler.cflags += ['-Wno-sign-compare']
     compiler.cxxincludes += [
       os.path.join(sdk.path, 'common', 'protobuf-2.3.0', 'src'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'csgo', 'protobuf')
     ]
-  elif sdk.name is 'dota':
+  elif sdk.name == 'dota':
     compiler.cxxincludes += [
       os.path.join(sdk.path, 'common', 'protobuf-2.4.1', 'src'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf'),
@@ -25,15 +25,15 @@ for sdk_name in SM.sdks:
       os.path.join(sdk.path, 'public', 'game', 'shared', 'dota', 'protobuf')
     ]
 
-  if builder.target_platform is 'linux':
+  if builder.target_platform == 'linux':
     compiler.postlink += ['-lpthread', '-lrt']
 
-  if sdk.name is 'csgo' or sdk.name is 'dota':
-    if builder.target_platform is 'linux':
+  if sdk.name == 'csgo' or sdk.name == 'dota':
+    if builder.target_platform == 'linux':
       lib_path = os.path.join(sdk.path, 'lib', 'linux32', 'release', 'libprotobuf.a')
-    elif builder.target_platform is 'mac':
+    elif builder.target_platform == 'mac':
       lib_path = os.path.join(sdk.path, 'lib', 'osx32', 'release', 'libprotobuf.a')
-    elif builder.target_platform is 'windows':
+    elif builder.target_platform == 'windows':
       if 'DEBUG' in compiler.defines:
         lib_path = os.path.join(sdk.path, 'lib', 'win32', 'debug', 'vs2010', 'libprotobuf.lib')
       else:
@@ -89,13 +89,13 @@ for sdk_name in SM.sdks:
   else:
     binary.sources += ['smn_bitbuffer.cpp']
 
-  if sdk.name is 'csgo':
+  if sdk.name == 'csgo':
     binary.sources += [
       os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'netmessages.pb.cc'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'csgo', 'protobuf', 'cstrike15_usermessages.pb.cc'),
       os.path.join(sdk.path, 'public', 'game', 'shared', 'csgo', 'protobuf', 'cstrike15_usermessage_helpers.cpp'),
     ]
-  elif sdk.name is 'dota':
+  elif sdk.name == 'dota':
     binary.sources += [
       os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'networkbasetypes.pb.cc'),
       os.path.join(sdk.path, 'public', 'engine', 'protobuf', 'netmessages.pb.cc'),
diff --git a/core/logic/AMBuilder b/core/logic/AMBuilder
index c53e81db..adbbce2f 100644
--- a/core/logic/AMBuilder
+++ b/core/logic/AMBuilder
@@ -14,9 +14,9 @@ binary.compiler.defines += [
   'SM_LOGIC'
 ]
   
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   binary.compiler.postlink += ['-lpthread', '-lrt']
-elif builder.target_platform is 'mac':
+elif builder.target_platform == 'mac':
   binary.compiler.cflags += ['-Wno-deprecated-declarations']
   binary.compiler.postlink += ['-framework', 'CoreServices']
 binary.sources += [
@@ -64,7 +64,7 @@ binary.sources += [
   'smn_database.cpp',
   'ForwardSys.cpp',
 ]
-if builder.target_platform is 'windows':
+if builder.target_platform == 'windows':
   binary.sources += ['thread/WinThreads.cpp']
 else:
   binary.sources += ['thread/PosixThreads.cpp']
diff --git a/extensions/curl/AMBuilder b/extensions/curl/AMBuilder
index 4908426e..1b15e5df 100644
--- a/extensions/curl/AMBuilder
+++ b/extensions/curl/AMBuilder
@@ -9,9 +9,9 @@ binary.compiler.includes += [
 ]
 binary.compiler.defines += ['CURL_STATICLIB']
 binary.compiler.postlink += [libcurl.binary]
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   binary.compiler.postlink += ['-lrt']
-elif builder.target_platform is 'windows':
+elif builder.target_platform == 'windows':
   binary.compiler.postlink += ['ws2_32.lib']
 
 binary.sources += [
diff --git a/extensions/curl/curl-src/lib/AMBuilder b/extensions/curl/curl-src/lib/AMBuilder
index 8c14f59a..afca6519 100644
--- a/extensions/curl/curl-src/lib/AMBuilder
+++ b/extensions/curl/curl-src/lib/AMBuilder
@@ -9,18 +9,18 @@ binary.compiler.includes += [
   os.path.join(builder.sourcePath, 'extensions', 'curl', 'curl-src', 'include')
 ]
 
-if builder.target_platform is 'mac':
+if builder.target_platform == 'mac':
   mac_version, ignore, ignore = platform.mac_ver()
   mac_tuple = mac_version.split('.')
   if int(mac_tuple[0]) >= 10 and int(mac_tuple[1]) >= 9:
     binary.compiler.defines += ['BUILTIN_STRLCAT']
-elif builder.target_platform is 'windows':
+elif builder.target_platform == 'windows':
   binary.compiler.defines += [
     'BUILDING_LIBCURL',
     'CURL_STATICLIB',
     'CURL_DISABLE_LDAP',
   ]
-elif builder.target_platform is 'linux':
+elif builder.target_platform == 'linux':
   binary.compiler.defines += ['_GNU_SOURCE']
 
 binary.sources += [
diff --git a/extensions/geoip/AMBuilder b/extensions/geoip/AMBuilder
index 32d1eb09..69722034 100644
--- a/extensions/geoip/AMBuilder
+++ b/extensions/geoip/AMBuilder
@@ -2,7 +2,7 @@
 import os
 
 binary = SM.ExtLibrary(builder, 'geoip.ext')
-if builder.target_platform is 'windows':
+if builder.target_platform == 'windows':
   binary.compiler.postlink += ['wsock32.lib']
 
 binary.sources += [
diff --git a/extensions/mysql/AMBuilder b/extensions/mysql/AMBuilder
index 1d0a4a92..48a39c53 100644
--- a/extensions/mysql/AMBuilder
+++ b/extensions/mysql/AMBuilder
@@ -8,14 +8,14 @@ if SM.mysql_root:
     os.path.join(SM.mms_root, 'core', 'sourcehook')
   ]
 
-  if builder.target_platform is 'linux' or builder.target_platform is 'mac':
+  if builder.target_platform == 'linux' or builder.target_platform == 'mac':
     binary.compiler.postlink += [
       os.path.join(SM.mysql_root, 'lib', 'libmysqlclient_r.a'),
       '-lz',
       '-lpthread',
       '-lm'
     ]
-  elif builder.target_platform is 'windows':
+  elif builder.target_platform == 'windows':
     binary.compiler.postlink += [
       os.path.join(SM.mysql_root, 'lib', 'opt', 'mysqlclient.lib'),
       os.path.join(SM.mysql_root, 'lib', 'opt', 'zlib.lib'),
diff --git a/extensions/regex/AMBuilder b/extensions/regex/AMBuilder
index 5ae30b62..8d6ff4d9 100644
--- a/extensions/regex/AMBuilder
+++ b/extensions/regex/AMBuilder
@@ -6,11 +6,11 @@ binary.compiler.cxxincludes += [
   os.path.join(SM.mms_root, 'core', 'sourcehook'),
 ]
 
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   path = os.path.join(builder.sourcePath, 'extensions', 'regex', 'lib_linux', 'libpcre.a')
-elif builder.target_platform is 'windows':
+elif builder.target_platform == 'windows':
   path = os.path.join(builder.sourcePath, 'extensions', 'regex', 'lib_win', 'pcre.lib')
-elif builder.target_platform is 'mac':
+elif builder.target_platform == 'mac':
   path = os.path.join(builder.sourcePath, 'extensions', 'regex', 'lib_darwin', 'libpcre.a')
 binary.compiler.postlink += [binary.Dep(path)]
 
diff --git a/extensions/sdkhooks/AMBuilder b/extensions/sdkhooks/AMBuilder
index 1c5c563d..061d3278 100644
--- a/extensions/sdkhooks/AMBuilder
+++ b/extensions/sdkhooks/AMBuilder
@@ -8,7 +8,7 @@ for sdk_name in SM.sdks:
   binary.compiler.cxxincludes += [
     os.path.join(sdk.path, 'game', 'shared')
   ]
-  if binary.compiler.cxx.behavior is 'gcc':
+  if binary.compiler.cxx.behavior == 'gcc':
     binary.compiler.cxxflags += ['-Wno-invalid-offsetof']
 
   binary.sources += [
diff --git a/extensions/sdktools/AMBuilder b/extensions/sdktools/AMBuilder
index 95d5f51e..43291991 100644
--- a/extensions/sdktools/AMBuilder
+++ b/extensions/sdktools/AMBuilder
@@ -14,7 +14,7 @@ for sdk_name in SM.sdks:
   if sdk.name != 'ep1':
     binary.compiler.defines += ['HOOKING_ENABLED']
 
-  if binary.compiler.cxx.behavior is 'gcc':
+  if binary.compiler.cxx.behavior == 'gcc':
     binary.compiler.cxxflags += ['-Wno-invalid-offsetof']
 
   binary.sources += [
diff --git a/extensions/sqlite/AMBuilder b/extensions/sqlite/AMBuilder
index 1a9f2ec5..e9c567dd 100644
--- a/extensions/sqlite/AMBuilder
+++ b/extensions/sqlite/AMBuilder
@@ -10,7 +10,7 @@ binary.compiler.defines += [
   'SQLITE_OMIT_LOAD_EXTENSION',
   'SQLITE_THREADSAFE'
 ]
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   binary.compiler.postlink += ['-ldl', '-lpthread']
 
 binary.sources += [
diff --git a/loader/AMBuilder b/loader/AMBuilder
index 419a4c22..c9089275 100644
--- a/loader/AMBuilder
+++ b/loader/AMBuilder
@@ -4,7 +4,7 @@ import os.path
 if builder.target_platform in ['windows', 'mac']:
   name = 'sourcemod_mm'
   extra_ldflags = []
-elif builder.target_platform is 'linux':
+elif builder.target_platform == 'linux':
   name = 'sourcemod_mm_i486'
   extra_ldflags = ['-ldl']
 
diff --git a/sourcepawn/compiler/AMBuilder b/sourcepawn/compiler/AMBuilder
index 4459ad33..aae178bc 100644
--- a/sourcepawn/compiler/AMBuilder
+++ b/sourcepawn/compiler/AMBuilder
@@ -10,15 +10,15 @@ compiler.includes += [
   os.path.join(builder.buildPath, 'includes'),
 ]
  
-if compiler.cc.behavior is 'gcc':
+if compiler.cc.behavior == 'gcc':
   compiler.cflags += ['-Wno-format']
-  if builder.target_platform is 'linux':
+  if builder.target_platform == 'linux':
     compiler.postlink += ['-lgcc', '-lm']
-elif compiler.cc.behavior is 'msvc':
+elif compiler.cc.behavior == 'msvc':
   compiler.linkflags.remove('/SUBSYSTEM:WINDOWS')
   compiler.linkflags.append('/SUBSYSTEM:CONSOLE')
  
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   compiler.defines += [
     'LINUX',
     'HAVE_STDINT_H',
@@ -26,7 +26,7 @@ if builder.target_platform is 'linux':
     'ENABLE_BINRELOC',
     '_GNU_SOURCE'
   ]
-elif builder.target_platform is 'mac':
+elif builder.target_platform == 'mac':
   compiler.defines += [
     'DARWIN',
     'HAVE_STDINT_H',
@@ -69,7 +69,7 @@ binary.sources += [
   'zlib/zutil.c',
   'sp_symhash.c'
 ]
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   binary.sources.append('binreloc.c')
  
 SM.spcomp = builder.Add(binary)
diff --git a/sourcepawn/jit/AMBuilder b/sourcepawn/jit/AMBuilder
index b5107edc..7b3fb6cc 100644
--- a/sourcepawn/jit/AMBuilder
+++ b/sourcepawn/jit/AMBuilder
@@ -14,10 +14,8 @@ binary.compiler.includes += [
   os.path.join(builder.sourcePath, 'knight', 'shared'),
 ]
 
-if builder.target_platform is 'linux':
+if builder.target_platform == 'linux':
   binary.compiler.postlink += ['-lpthread', '-lrt']
-elif builder.target_platform is 'darwin':
-  binary.compiler.postlink += ['-lpthread', '-ldl']
 
 binary.sources += [
   'BaseRuntime.cpp',
diff --git a/tools/buildbot/BreakpadSymbols b/tools/buildbot/BreakpadSymbols
index f353836c..2d8a7b1b 100644
--- a/tools/buildbot/BreakpadSymbols
+++ b/tools/buildbot/BreakpadSymbols
@@ -13,11 +13,11 @@ for cxx_task in cxx_tasks:
 		debug_entry = cxx_task.binary
 
 	debug_file = os.path.join(builder.buildPath, debug_entry.path)
-	if builder.target_platform is 'linux':
+	if builder.target_platform == 'linux':
 		argv = ['dump_syms', debug_file, os.path.dirname(debug_file)]
-	elif builder.target_platform is 'mac':
+	elif builder.target_platform == 'mac':
 		argv = ['dump_syms', debug_file]
-	elif builder.target_platform is 'windows':
+	elif builder.target_platform == 'windows':
 		argv = ['dump_syms.exe', debug_file]
 
 	base_file = os.path.splitext(os.path.basename(debug_file))[0]
diff --git a/tools/buildbot/PackageScript b/tools/buildbot/PackageScript
index 9528401a..9f839eeb 100644
--- a/tools/buildbot/PackageScript
+++ b/tools/buildbot/PackageScript
@@ -52,7 +52,7 @@ for cxx_task in SM.extensions:
 builder.AddCopy(SM.spcomp.binary, folder_map['addons/sourcemod/scripting'])
 
 # Copy debugging files.
-if builder.options.packdebug and builder.target_platform is not 'mac':
+if builder.options.packdebug and builder.target_platform != 'mac':
   for cxx_task in SM.binaries:
     builder.AddCopy(cxx_task.debug, folder_map['addons/sourcemod/bin'])
   for cxx_task in SM.extensions: