diff --git a/EmulatorPkg/build.sh b/EmulatorPkg/build.sh
index e031c3ee00..06ec37a4c1 100755
--- a/EmulatorPkg/build.sh
+++ b/EmulatorPkg/build.sh
@@ -81,6 +81,20 @@ case `uname` in
         HOST_PROCESSOR=X64
         ;;
     esac
+
+    gcc_version=$(gcc -v 2>&1 | tail -1 | awk '{print $3}')
+    case $gcc_version in
+      4.5.*)
+        TARGET_TOOLS=GCC45
+        ;;
+      4.6.*)
+        TARGET_TOOLS=GCC46
+        ;;
+      *)
+        TARGET_TOOLS=GCC44
+        exit 1
+        ;;
+    esac
     ;;
 esac