diff --git a/CI/appveyor/msvc/build.cmd b/CI/appveyor/msvc/build.cmd
index 7a7ff5908..804cecbee 100644
--- a/CI/appveyor/msvc/build.cmd
+++ b/CI/appveyor/msvc/build.cmd
@@ -8,6 +8,7 @@ cmake -G Ninja^
  -DCMAKE_INSTALL_PREFIX="C:/Program Files/Pioneer"^
  -DPIONEER_DATA_DIR="C:/Program Files/Pioneer/data"^
  -DCMAKE_BUILD_TYPE:STRING=Release^
+ -DCMAKE_INSTALL_MESSAGE=NEVER^
  -DGIT_EXECUTABLE="c:/Program Files/Git/cmd/git.exe"^
  c:\projects\pioneer || goto error
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0fc8db938..75e008c19 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,8 +40,11 @@ if (MSVC)
 	# Use M_PI/M_E macros from math.h
 	add_definitions(-D_USE_MATH_DEFINES -DHAVE_M_PI)
 
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
+    # Disable warning C4506 so that src/lua/LuaObject.h: template <> void LuaObject<SystemPath>::PushToLua(const SystemPath &o);
+    # doesn't spew multiple warnings
+
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP /wd4506")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4506")
 endif (MSVC)
 
 if (APPLE)