diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 4a023bda11..89b4e51e33 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -13,8 +13,6 @@ set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 
 # Disable tests/tools in all externals supporting the standard option name
 set(BUILD_TESTING OFF)
-set(BUILD_TESTS OFF)
-set(BUILD_TOOLS OFF)
 
 # Build only static externals
 set(BUILD_SHARED_LIBS OFF)
diff --git a/externals/libusb/CMakeLists.txt b/externals/libusb/CMakeLists.txt
index 1d50c9f8c8..ec7724e874 100644
--- a/externals/libusb/CMakeLists.txt
+++ b/externals/libusb/CMakeLists.txt
@@ -235,6 +235,12 @@ else() # MINGW OR (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
         )
     endif()
 
+    if(UNIX)
+        set(PLATFORM_POSIX TRUE)
+    else()
+        set(PLATFORM_WINDOWS TRUE)
+    endif()
+
     include(CheckFunctionExists)
     include(CheckIncludeFiles)
     include(CheckTypeSize)
diff --git a/externals/libusb/config.h.in b/externals/libusb/config.h.in
index 42ae5a5e8a..9ddc6c1276 100644
--- a/externals/libusb/config.h.in
+++ b/externals/libusb/config.h.in
@@ -93,3 +93,7 @@
 
 /* Oldest Windows version supported */
 #define WINVER 0x0501
+
+#cmakedefine PLATFORM_POSIX
+
+#cmakedefine PLATFORM_WINDOWS
diff --git a/src/audio_core/externals/cubeb/CMakeLists.txt b/src/audio_core/externals/cubeb/CMakeLists.txt
index f7cc2907a5..ffa26358ba 100644
--- a/src/audio_core/externals/cubeb/CMakeLists.txt
+++ b/src/audio_core/externals/cubeb/CMakeLists.txt
@@ -10,6 +10,8 @@ CPMAddPackage(
     FIND_PACKAGE_ARGUMENTS "CONFIG" # not sure this works outside of gentoo
     OPTIONS
         "USE_SANITIZERS OFF"
+        "BUILD_TESTS OFF"
+        "BUILD_TOOLS OFF"
 )
 
 if (cubeb_ADDED)