diff --git a/CMake/DolphinLibraryTools.cmake b/CMake/DolphinLibraryTools.cmake
index f2305d8399..bedba9dcbd 100644
--- a/CMake/DolphinLibraryTools.cmake
+++ b/CMake/DolphinLibraryTools.cmake
@@ -50,6 +50,17 @@ function(dolphin_add_bundled_library library use_system bundled_path)
   add_subdirectory(${bundled_path} EXCLUDE_FROM_ALL)
 endfunction()
 
+function(dolphin_set_library_type library type)
+  if(DEFINED ${library}_TYPE AND NOT ${${library}_TYPE} STREQUAL "${type}")
+    message(FATAL_ERROR
+      "The selection for ${library} changed from '${${library}_TYPE}' to '${type}' after configuration.\n"
+      "Please delete the build directory (or at least CMakeCache.txt) and reconfigure."
+    )
+  endif()
+
+  set(${library}_TYPE "${type}" CACHE INTERNAL "")
+endfunction()
+
 function(dolphin_find_optional_system_library library bundled_path)
   dolphin_optional_system_library(use_system ${library})
   string(TOUPPER ${library} upperlib)
@@ -101,11 +112,11 @@ function(dolphin_find_optional_system_library library bundled_path)
     endif()
   endif()
   if(${prefix}_FOUND)
+    dolphin_set_library_type(${library} "System")
     message(STATUS "Using system ${library}")
-    set(${prefix}_TYPE "System" PARENT_SCOPE)
   else()
+    dolphin_set_library_type(${library} "Bundled")
     dolphin_add_bundled_library(${library} ${use_system} ${bundled_path})
-    set(${prefix}_TYPE "Bundled" PARENT_SCOPE)
   endif()
 endfunction()
 
@@ -119,11 +130,11 @@ function(dolphin_find_optional_system_library_pkgconfig library search alias bun
     endif()
   endif()
   if(${library}_FOUND)
+    dolphin_set_library_type(${library} "System")
     message(STATUS "Using system ${library}")
     dolphin_alias_library(${alias} PkgConfig::${library})
-    set(${library}_TYPE "System" PARENT_SCOPE)
   else()
+    dolphin_set_library_type(${library} "Bundled")
     dolphin_add_bundled_library(${library} ${use_system} ${bundled_path})
-    set(${library}_TYPE "Bundled" PARENT_SCOPE)
   endif()
 endfunction()
diff --git a/CMake/FindLibUSB.cmake b/CMake/FindLibUSB.cmake
index 5a6fc7197f..54403b7aec 100644
--- a/CMake/FindLibUSB.cmake
+++ b/CMake/FindLibUSB.cmake
@@ -11,8 +11,15 @@
 if(ANDROID)
   set(LIBUSB_FOUND FALSE CACHE INTERNAL "libusb-1.0 found")
   message(STATUS "libusb-1.0 not found.")
-elseif (NOT LIBUSB_FOUND)
-  pkg_check_modules (LIBUSB_PKG libusb-1.0)
+  return()
+endif()
+
+if(TARGET LibUSB::LibUSB)
+  return()
+endif()
+
+if(NOT LIBUSB_FOUND)
+  pkg_check_modules(LIBUSB_PKG libusb-1.0)
 
   find_path(LIBUSB_INCLUDE_DIR NAMES libusb.h
     PATHS
@@ -30,21 +37,19 @@ elseif (NOT LIBUSB_FOUND)
     /usr/local/lib
   )
 
-  if(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-    set(LIBUSB_FOUND TRUE CACHE INTERNAL "libusb-1.0 found")
-    message(STATUS "Found libusb-1.0: ${LIBUSB_INCLUDE_DIR}, ${LIBUSB_LIBRARIES}")
-  else(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-    set(LIBUSB_FOUND FALSE CACHE INTERNAL "libusb-1.0 found")
-    message(STATUS "libusb-1.0 not found.")
-  endif(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-
   mark_as_advanced(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
-endif ()
-if(LIBUSB_FOUND AND NOT TARGET LibUSB::LibUSB)
+endif()
+
+
+if(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
   add_library(LibUSB::LibUSB UNKNOWN IMPORTED)
   set_target_properties(LibUSB::LibUSB PROPERTIES
     IMPORTED_LOCATION "${LIBUSB_LIBRARIES}"
     INTERFACE_INCLUDE_DIRECTORIES "${LIBUSB_INCLUDE_DIR}"
   )
+  set(LIBUSB_FOUND TRUE CACHE INTERNAL "libusb-1.0 found")
+  message(STATUS "Found libusb-1.0: ${LIBUSB_INCLUDE_DIR}, ${LIBUSB_LIBRARIES}")
+else()
+  set(LIBUSB_FOUND FALSE CACHE INTERNAL "libusb-1.0 found")
+  message(STATUS "libusb-1.0 not found.")
 endif()
-
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ffe18889b..2711a222a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -582,10 +582,6 @@ if(UNIX)
   add_definitions(-DUSE_MEMORYWATCHER=1)
 endif()
 
-if(ENABLE_SDL)
-  dolphin_find_optional_system_library(SDL3 Externals/SDL 3.2.0)
-endif()
-
 if(ENABLE_ANALYTICS)
   message(STATUS "Enabling analytics collection (subject to end-user opt-in)")
   add_definitions(-DUSE_ANALYTICS=1)
@@ -658,6 +654,13 @@ if(NOT (WIN32 AND _M_ARM_64))
   add_definitions(-DHAS_OPENGL)
 endif()
 
+if(NOT WIN32)
+  if(ANDROID)
+    set(USE_SYSTEM_Iconv OFF)
+  endif()
+  dolphin_find_optional_system_library(Iconv Externals/libiconv 1.14)
+endif()
+
 dolphin_find_optional_system_library(pugixml Externals/pugixml)
 
 dolphin_find_optional_system_library_pkgconfig(ENET libenet>=1.3.18 enet::enet Externals/enet)
@@ -701,12 +704,14 @@ if(ENABLE_CUBEB)
 endif()
 
 if(NOT ANDROID)
-  dolphin_find_optional_system_library_pkgconfig(
-    LibUSB libusb-1.0 LibUSB::LibUSB Externals/libusb
-  )
+  dolphin_find_optional_system_library(LibUSB Externals/libusb)
   add_definitions(-D__LIBUSB__)
 endif()
 
+if(ENABLE_SDL)
+  dolphin_find_optional_system_library(SDL3 Externals/SDL 3.2.0)
+endif()
+
 dolphin_find_optional_system_library(SFML Externals/SFML 3.0 COMPONENTS Network System)
 
 if(USE_UPNP)
@@ -718,15 +723,6 @@ dolphin_find_optional_system_library(MBEDTLS Externals/mbedtls 2.28)
 
 dolphin_find_optional_system_library(CURL Externals/curl)
 
-if(NOT WIN32)
-  if(NOT ANDROID)
-    dolphin_find_optional_system_library(Iconv Externals/libiconv 1.14)
-  else()
-    message(STATUS "Using static iconv from Externals")
-    add_subdirectory(Externals/libiconv EXCLUDE_FROM_ALL)
-  endif()
-endif()
-
 if(NOT ANDROID)
   dolphin_find_optional_system_library(HIDAPI Externals/hidapi)
 endif()
diff --git a/Externals/SDL/CMakeLists.txt b/Externals/SDL/CMakeLists.txt
index 0316360241..6bdd630101 100644
--- a/Externals/SDL/CMakeLists.txt
+++ b/Externals/SDL/CMakeLists.txt
@@ -20,6 +20,11 @@ if(CCACHE_BIN)
   set(CCACHE_BINARY ${CCACHE_BIN})
 endif()
 
+if(LibUSB_TYPE STREQUAL Bundled)
+  set(LibUSB_FOUND TRUE)
+  set(SDL_HIDAPI_LIBUSB_SHARED OFF)
+endif()
+
 add_subdirectory(SDL)
 
 if (TARGET SDL3)
diff --git a/Externals/curl/CMakeLists.txt b/Externals/curl/CMakeLists.txt
index 55f010fb15..a391aab603 100644
--- a/Externals/curl/CMakeLists.txt
+++ b/Externals/curl/CMakeLists.txt
@@ -13,7 +13,9 @@ set(HTTP_ONLY ON)
 set(CURL_USE_LIBPSL OFF)
 set(CURL_USE_LIBSSH2 OFF)
 set(CURL_ZLIB OFF CACHE BOOL "" FORCE)
-set(CURL_ZSTD OFF)
+set(CURL_ZSTD OFF CACHE BOOL "" FORCE)
+set(ZLIB_FOUND FALSE) # TODO: Remove once we update to cURL >=8.17.1 https://github.com/curl/curl/pull/20147
+set(ZSTD_FOUND FALSE) # TODO: Same as above
 set(USE_LIBIDN2 OFF)
 set(USE_NGHTTP2 OFF)
 
diff --git a/Externals/libusb/CMakeLists.txt b/Externals/libusb/CMakeLists.txt
index dafb563f72..ffd6d42781 100644
--- a/Externals/libusb/CMakeLists.txt
+++ b/Externals/libusb/CMakeLists.txt
@@ -125,4 +125,15 @@ check_include_files(sys/timerfd.h HAVE_TIMERFD)
 check_include_files(unistd.h HAVE_UNISTD_H)
 
 configure_file(config.h.in config.h)
-add_library(LibUSB::LibUSB ALIAS usb)
+
+# We don't create an ALIAS here so that dependencies (SDL) that try_compile libusb
+# don't fail due to LibUSB::LibUSB being an alias target
+add_library(LibUSB::LibUSB INTERFACE IMPORTED GLOBAL)
+target_link_libraries(LibUSB::LibUSB
+  INTERFACE
+    usb
+)
+target_include_directories(LibUSB::LibUSB
+  INTERFACE
+    ${CMAKE_CURRENT_SOURCE_DIR}/libusb/libusb
+)
diff --git a/Externals/minizip-ng/CMakeLists.txt b/Externals/minizip-ng/CMakeLists.txt
index adf2611841..9e7d41cbbf 100644
--- a/Externals/minizip-ng/CMakeLists.txt
+++ b/Externals/minizip-ng/CMakeLists.txt
@@ -3,7 +3,42 @@ set(MZ_BUILD_TESTS OFF)
 set(MZ_BUILD_UNIT_TESTS OFF)
 set(MZ_BUILD_FUZZ_TESTS OFF)
 set(MZ_CODE_COVERAGE OFF)
+set(MZ_FETCH_LIBS OFF)
+set(MZ_BZIP2 OFF)
+set(MZ_PKCRYPT OFF)
+set(MZ_WZAES OFF)
+set(MZ_OPENSSL OFF)
+set(MZ_LIBBSD OFF)
 set(SKIP_INSTALL_ALL ON)
 
+if(Iconv_TYPE STREQUAL Bundled)
+  set(CMAKE_DISABLE_FIND_PACKAGE_Iconv TRUE)
+  set(Iconv_FOUND TRUE)
+  set(Iconv_LIBRARIES Iconv::Iconv)
+  get_target_property(Iconv_INCLUDE_DIRS ${Iconv_LIBRARIES} INTERFACE_INCLUDE_DIRECTORIES)
+endif()
+if(LibLZMA_TYPE STREQUAL Bundled)
+  set(CMAKE_DISABLE_FIND_PACKAGE_LibLZMA TRUE)
+  set(LIBLZMA_FOUND TRUE)
+  set(LIBLZMA_LIBRARIES LibLZMA::LibLZMA)
+  get_target_property(LIBLZMA_INCLUDE_DIRS ${LIBLZMA_LIBRARIES} INTERFACE_INCLUDE_DIRECTORIES)
+endif()
+if(ZLIB_TYPE STREQUAL Bundled)
+  set(CMAKE_DISABLE_FIND_PACKAGE_ZLIB TRUE)
+  set(ZLIB_FOUND TRUE)
+  set(ZLIB_LIBRARIES ZLIB::ZLIB)
+  get_target_property(ZLIB_INCLUDE_DIRS ${ZLIB_LIBRARIES} INTERFACE_INCLUDE_DIRECTORIES)
+endif()
+if(ZSTD_TYPE STREQUAL Bundled)
+  set(CMAKE_DISABLE_FIND_PACKAGE_ZSTD TRUE)
+  set(ZSTD_FOUND TRUE)
+  set(ZSTD_LIBRARIES zstd::zstd)
+  get_target_property(ZSTD_INCLUDE_DIRS ${ZSTD_LIBRARIES} INTERFACE_INCLUDE_DIRECTORIES)
+endif()
+
+# minizip-ng otherwise uses system libraries when we provide them above
+set(CMAKE_DISABLE_FIND_PACKAGE_PkgConfig TRUE)
+set(PKGCONFIG_FOUND FALSE)
+
 add_subdirectory(minizip-ng)
 dolphin_disable_warnings(minizip-ng)