diff --git a/scripts/toolchain.lua b/scripts/toolchain.lua
index 0ab28be..a757749 100644
--- a/scripts/toolchain.lua
+++ b/scripts/toolchain.lua
@@ -236,13 +236,13 @@ function toolchain(_buildDir, _libDir)
 
 		elseif "asmjs" == _OPTIONS["gcc"] then
 
-			if not os.getenv("EMSCRIPTEN") then
-				print("Set EMSCRIPTEN environment variable.")
+			if not os.getenv("EMSDK") then
+				print("Set EMSDK environment variable.")
 			end
 
-			premake.gcc.cc   = "\"$(EMSCRIPTEN)/emcc\""
-			premake.gcc.cxx  = "\"$(EMSCRIPTEN)/em++\""
-			premake.gcc.ar   = "\"$(EMSCRIPTEN)/emar\""
+			premake.gcc.cc   = "\"$(EMSDK)/fastcomp/bin/emcc\""
+			premake.gcc.cxx  = "\"$(EMSDK)/fastcomp/bin/em++\""
+			premake.gcc.ar   = "\"$(EMSDK)/fastcomp/bin/emar\""
 			premake.gcc.llvm = true
 			location (path.join(_buildDir, "projects", _ACTION .. "-asmjs"))
 
@@ -926,9 +926,7 @@ function toolchain(_buildDir, _libDir)
 		objdir (path.join(_buildDir, "asmjs/obj"))
 		libdirs { path.join(_libDir, "lib/asmjs") }
 		buildoptions {
-			"-isystem \"$(EMSCRIPTEN)/system/include\"",
-			"-isystem \"$(EMSCRIPTEN)/system/include/libcxx\"",
-			"-isystem \"$(EMSCRIPTEN)/system/include/libc\"",
+			"-isystem \"$(EMSDK)/fastcomp/emscripten\"",
 			"-Wunused-value",
 			"-Wundef",
 		}
@@ -1230,7 +1228,7 @@ function strip()
 	configuration { "asmjs" }
 		postbuildcommands {
 			"$(SILENT) echo Running asmjs finalize.",
-			"$(SILENT) \"$(EMSCRIPTEN)/emcc\" -O2 "
+			"$(SILENT) \"$(EMSDK)/fastcomp/bin/emcc\" -O2 "
 
 --				.. "-s ALLOW_MEMORY_GROWTH=1 "
 --				.. "-s ASSERTIONS=2 "