diff --git a/SConstruct b/SConstruct
index 16f2272..61d4a14 100644
--- a/SConstruct
+++ b/SConstruct
@@ -111,7 +111,7 @@ Export("env")
 Export("editor_env")
 if env["HOST"]: build = env["Build"] + "-" + env["HOST"]
 else: build = env["Build"]
-silvertree, editor = SConscript("src/SConscript", build_dir = join("build", build))
+silvertree, editor = SConscript("src/SConscript", build_dir = join("build", build), duplicate = False)
 
 if (not env["HOST"] or env["HOST"] == "mingw32") and env["Build"] == "release":
     ExecutableSuffix = env["PROGSUFFIX"]
diff --git a/src/editor/SConscript b/src/editor/SConscript
index 1024967..afbc535 100644
--- a/src/editor/SConscript
+++ b/src/editor/SConscript
@@ -3,6 +3,7 @@ Import("editor_env")
 Import("lib_silvertree")
 
 if editor_env["HaveQt"]:
+    editor_env.Append(CPPPATH = ".")
     editor_sources = Glob("*.cpp", source = True, strings = True)
     editor_sources.remove("oldmain.cpp")
     editor_uis = Glob("*.ui", source = True)