diff --git a/premake/json_checker.lua b/premake/json_checker.lua
new file mode 100644
index 0000000..57cab45
--- /dev/null
+++ b/premake/json_checker.lua
@@ -0,0 +1,20 @@
+
+local base_dir = (solution().basedir .. "/external/json_checker/")
+
+group "external"
+    project "json_checker"
+        kind "StaticLib"
+        language "C++"
+        location (_ACTION .. "/" .. project().name)
+
+        includedirs
+        {
+            base_dir .. "include/"
+        }
+        files
+        {
+            base_dir .. "*.h",
+            base_dir .. "*.cpp"
+        }
+    project "*"
+group ""
diff --git a/premake/premake5.lua b/premake/premake5.lua
index 7112140..f1e993f 100644
--- a/premake/premake5.lua
+++ b/premake/premake5.lua
@@ -28,10 +28,7 @@ solution "demboyz"
         files
         {
             "../demboyz/**.h",
-            "../demboyz/**.cpp",
-            "../external/**.h",
-            "../external/**.cpp",
-            "../external/**.cc"
+            "../demboyz/**.cpp"
         }
         includedirs
         {
@@ -42,4 +39,13 @@ solution "demboyz"
             "../external/snappy-1.1.3/include",
             "../demboyz"
         }
+        links
+        {
+            "json_checker",
+            "sourcesdk"
+        }
+    project "*"
 
+    dofile "json_checker.lua"
+    dofile "snappy.lua"
+    dofile "sourcesdk.lua"
diff --git a/premake/snappy.lua b/premake/snappy.lua
new file mode 100644
index 0000000..2d6e9f5
--- /dev/null
+++ b/premake/snappy.lua
@@ -0,0 +1,20 @@
+
+local base_dir = (solution().basedir .. "/external/snappy-1.1.3/")
+
+group "external"
+    project "snappy"
+        kind "StaticLib"
+        language "C++"
+        location (_ACTION .. "/" .. project().name)
+
+        includedirs
+        {
+            base_dir .. "include/"
+        }
+        files
+        {
+            base_dir .. "*.h",
+            base_dir .. "*.cc"
+        }
+    project "*"
+group ""
diff --git a/premake/sourcesdk.lua b/premake/sourcesdk.lua
new file mode 100644
index 0000000..fe14e03
--- /dev/null
+++ b/premake/sourcesdk.lua
@@ -0,0 +1,26 @@
+
+local base_dir = (solution().basedir .. "/external/sourcesdk/")
+local external_dir = (solution().basedir .. "/external/")
+
+group "external"
+    project "sourcesdk"
+        kind "StaticLib"
+        language "C++"
+        location (_ACTION .. "/" .. project().name)
+
+        includedirs
+        {
+            base_dir .. "include/",
+            external_dir .. "snappy-1.1.3/include/"
+        }
+        files
+        {
+            base_dir .. "*.h",
+            base_dir .. "*.cpp"
+        }
+        links
+        {
+            "snappy"
+        }
+    project "*"
+group ""