diff --git a/makefile b/makefile
index 96685ff..687c024 100644
--- a/makefile
+++ b/makefile
@@ -1,4 +1,5 @@
 all: Program.cs
+	mkdir build/
 	nuget restore SteamAuth/SteamAuth/SteamAuth.sln
 	mcs -target:library -out:build/SteamAuth.dll -r:SteamAuth/SteamAuth/packages/Newtonsoft.Json.7.0.1/lib/net45/Newtonsoft.Json.dll SteamAuth/SteamAuth/APIEndpoints.cs SteamAuth/SteamAuth/AuthenticatorLinker.cs SteamAuth/SteamAuth/Confirmation.cs SteamAuth/SteamAuth/SessionData.cs SteamAuth/SteamAuth/SteamGuardAccount.cs SteamAuth/SteamAuth/SteamWeb.cs SteamAuth/SteamAuth/TimeAligner.cs SteamAuth/SteamAuth/UserLogin.cs SteamAuth/SteamAuth/Util.cs SteamAuth/SteamAuth/Properties/AssemblyInfo.cs
 	cp SteamAuth/SteamAuth/packages/Newtonsoft.Json.7.0.1/lib/net45/Newtonsoft.Json.dll build/
@@ -6,3 +7,6 @@ all: Program.cs
 
 run:
 	build/steamguard
+
+clean:
+	rm -r build/