diff --git a/externals/nx_tzdb/CMakeLists.txt b/externals/nx_tzdb/CMakeLists.txt
index 35d3e6d2a8..2d6b2fcc66 100644
--- a/externals/nx_tzdb/CMakeLists.txt
+++ b/externals/nx_tzdb/CMakeLists.txt
@@ -1,6 +1,3 @@
-# SPDX-FileCopyrightText: 2025 Eden Emulator Project
-# SPDX-License-Identifier: GPL-3.0-or-later
-
 # SPDX-FileCopyrightText: 2023 yuzu Emulator Project
 # SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -18,58 +15,35 @@ find_program(DATE_PROG date)
 
 set(CAN_BUILD_NX_TZDB true)
 
-if (NOT (GIT AND GNU_MAKE AND DATE_PROG) OR CMAKE_SYSTEM_NAME STREQUAL "Windows" OR ANDROID)
+if (NOT GIT)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (NOT GNU_MAKE)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (NOT DATE_PROG)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (CMAKE_SYSTEM_NAME STREQUAL "Windows" OR ANDROID)
     # tzdb_to_nx currently requires a posix-compliant host
     # MinGW and Android are handled here due to the executable format being different from the host system
     # TODO (lat9nq): cross-compiling support
-
     set(CAN_BUILD_NX_TZDB false)
 endif()
 
-if (CAN_BUILD_NX_TZDB AND NOT YUZU_DOWNLOAD_TIME_ZONE_DATA)
+set(NX_TZDB_VERSION "250725")
+set(NX_TZDB_ROMFS_DIR "${CPM_SOURCE_CACHE}/nx_tzdb")
+
+if ((NOT CAN_BUILD_NX_TZDB OR YUZU_DOWNLOAD_TIME_ZONE_DATA) AND NOT EXISTS ${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION})
+    message(STATUS "Downloading time zone data...")
+    AddJsonPackage(tzdb)
+elseif (CAN_BUILD_NX_TZDB AND NOT YUZU_DOWNLOAD_TIME_ZONE_DATA)
+    # TODO(crueter): this sucked to do with cpm, see if i can get it to work again
     message(FATAL_ERROR "Building tzdb is currently unsupported. Check back later.")
     add_subdirectory(tzdb_to_nx)
     add_dependencies(nx_tzdb x80e)
 
-    set(NX_TZDB_BASE_DIR "${NX_TZDB_DIR}")
-    set(NX_TZDB_TZ_DIR "${NX_TZDB_BASE_DIR}/zoneinfo")
-endif()
-
-# TODO(crueter): This is a terrible solution, but MSVC fails to link without it
-# Need to investigate further but I still can't reproduce...
-if (MSVC)
-    set(NX_TZDB_VERSION "250725")
-    set(NX_TZDB_ARCHIVE "${CPM_SOURCE_CACHE}/nx_tzdb/${NX_TZDB_VERSION}.zip")
-
-    set(NX_TZDB_BASE_DIR "${CPM_SOURCE_CACHE}/nx_tzdb/tz")
-    set(NX_TZDB_TZ_DIR "${NX_TZDB_BASE_DIR}/zoneinfo")
-
-    set(NX_TZDB_DOWNLOAD_URL "https://github.com/crueter/tzdb_to_nx/releases/download/${NX_TZDB_VERSION}/${NX_TZDB_VERSION}.zip")
-
-    message(STATUS "Downloading time zone data from ${NX_TZDB_DOWNLOAD_URL}...")
-    file(DOWNLOAD ${NX_TZDB_DOWNLOAD_URL} ${NX_TZDB_ARCHIVE}
-        STATUS NX_TZDB_DOWNLOAD_STATUS)
-
-    list(GET NX_TZDB_DOWNLOAD_STATUS 0 NX_TZDB_DOWNLOAD_STATUS_CODE)
-    if (NOT NX_TZDB_DOWNLOAD_STATUS_CODE EQUAL 0)
-        message(FATAL_ERROR "Time zone data download failed (status code ${NX_TZDB_DOWNLOAD_STATUS_CODE})")
-    endif()
-
-    file(ARCHIVE_EXTRACT
-        INPUT
-            ${NX_TZDB_ARCHIVE}
-        DESTINATION
-            ${NX_TZDB_BASE_DIR})
-else()
-    message(STATUS "Downloading time zone data...")
-    AddJsonPackage(tzdb)
-
-    target_include_directories(nx_tzdb
-        INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include
-        INTERFACE ${NX_TZDB_INCLUDE_DIR})
-
-    set(NX_TZDB_BASE_DIR "${CPM_SOURCE_CACHE}/nx_tzdb")
-    set(NX_TZDB_TZ_DIR "${nx_tzdb_SOURCE_DIR}")
+    set(NX_TZDB_ROMFS_DIR "${NX_TZDB_DIR}")
 endif()
 
 target_include_directories(nx_tzdb
@@ -94,25 +68,25 @@ function(CreateHeader ZONE_PATH HEADER_NAME)
     target_sources(nx_tzdb PRIVATE ${HEADER_PATH})
 endfunction()
 
-CreateHeader(${NX_TZDB_BASE_DIR} base)
-CreateHeader(${NX_TZDB_TZ_DIR} zoneinfo)
-CreateHeader(${NX_TZDB_TZ_DIR}/Africa africa)
-CreateHeader(${NX_TZDB_TZ_DIR}/America america)
-CreateHeader(${NX_TZDB_TZ_DIR}/America/Argentina america_argentina)
-CreateHeader(${NX_TZDB_TZ_DIR}/America/Indiana america_indiana)
-CreateHeader(${NX_TZDB_TZ_DIR}/America/Kentucky america_kentucky)
-CreateHeader(${NX_TZDB_TZ_DIR}/America/North_Dakota america_north_dakota)
-CreateHeader(${NX_TZDB_TZ_DIR}/Antarctica antarctica)
-CreateHeader(${NX_TZDB_TZ_DIR}/Arctic arctic)
-CreateHeader(${NX_TZDB_TZ_DIR}/Asia asia)
-CreateHeader(${NX_TZDB_TZ_DIR}/Atlantic atlantic)
-CreateHeader(${NX_TZDB_TZ_DIR}/Australia australia)
-CreateHeader(${NX_TZDB_TZ_DIR}/Brazil brazil)
-CreateHeader(${NX_TZDB_TZ_DIR}/Canada canada)
-CreateHeader(${NX_TZDB_TZ_DIR}/Chile chile)
-CreateHeader(${NX_TZDB_TZ_DIR}/Etc etc)
-CreateHeader(${NX_TZDB_TZ_DIR}/Europe europe)
-CreateHeader(${NX_TZDB_TZ_DIR}/Indian indian)
-CreateHeader(${NX_TZDB_TZ_DIR}/Mexico mexico)
-CreateHeader(${NX_TZDB_TZ_DIR}/Pacific pacific)
-CreateHeader(${NX_TZDB_TZ_DIR}/US us)
+CreateHeader(${NX_TZDB_ROMFS_DIR} base)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION} zoneinfo)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Africa africa)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/America america)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/America/Argentina america_argentina)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/America/Indiana america_indiana)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/America/Kentucky america_kentucky)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/America/North_Dakota america_north_dakota)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Antarctica antarctica)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Arctic arctic)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Asia asia)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Atlantic atlantic)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Australia australia)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Brazil brazil)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Canada canada)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Chile chile)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Etc etc)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Europe europe)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Indian indian)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Mexico mexico)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/Pacific pacific)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/${NX_TZDB_VERSION}/US us)
diff --git a/src/common/ring_buffer.h b/src/common/ring_buffer.h
index 86de96b43e..14f6eceeb8 100644
--- a/src/common/ring_buffer.h
+++ b/src/common/ring_buffer.h
@@ -15,7 +15,6 @@
 #include <span>
 #include <type_traits>
 #include <vector>
-#include <mutex>
 
 namespace Common {