diff --git a/CMakeModules/list_directory.cmake b/CMakeModules/list_directory.cmake
new file mode 100644
index 0000000..9f4648e
--- /dev/null
+++ b/CMakeModules/list_directory.cmake
@@ -0,0 +1,10 @@
+set(WITH_DIRECTORIES ${CMAKE_ARGV3})
+set(RECURSE ${CMAKE_ARGV4})
+
+set(HOW_TO_GLOB "GLOB")
+if (RECURSE)
+    set(HOW_TO_GLOB "GLOB_RECURSE")
+endif()
+
+file(${HOW_TO_GLOB} FILE_LIST LIST_DIRECTORIES ${WITH_DIRECTORIES} RELATIVE ${CMAKE_SOURCE_DIR} "*")
+execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${FILE_LIST};")
\ No newline at end of file
diff --git a/externals/tz/CMakeLists.txt b/externals/tz/CMakeLists.txt
index 68d70fd..d0a9589 100644
--- a/externals/tz/CMakeLists.txt
+++ b/externals/tz/CMakeLists.txt
@@ -28,7 +28,23 @@ if (NOT EXISTS "${TZ_DIR}" OR NOT EXISTS "${TZIF_LIST_FILE}")
 
     execute_process(
         COMMAND
-            sh "${CMAKE_CURRENT_SOURCE_DIR}/find_tzif.sh" "${TZ_ZONEINFO_DIR}" "${TZIF_LIST_FILE}"
-        COMMAND_ERROR_IS_FATAL ANY
+           ${CMAKE_COMMAND} -P ${PROJECT_SOURCE_DIR}/CMakeModules/list_directory.cmake false ON
+        WORKING_DIRECTORY
+            "${TZ_ZONEINFO_DIR}"
+        OUTPUT_VARIABLE
+            TZIF_SCAN
     )
+
+    set(TZIF_LIST "")
+    foreach(CANDIDATE ${TZIF_SCAN})
+        if (CANDIDATE STREQUAL "\n")
+            continue()
+        endif()
+        set(TZIF_FILE "${TZ_ZONEINFO_DIR}/${CANDIDATE}")
+        file(READ "${TZIF_FILE}" HEADER LIMIT 4)
+        string(SUBSTRING "${HEADER}" 0 4 HEADER) # Remove trailing newline
+        if (HEADER STREQUAL "TZif")
+            file(APPEND "${TZIF_LIST_FILE}" "${TZIF_FILE}\n")
+        endif()
+    endforeach()
 endif()
diff --git a/externals/tz/find_tzif.sh b/externals/tz/find_tzif.sh
deleted file mode 100644
index 6664440..0000000
--- a/externals/tz/find_tzif.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#/bin/sh
-set -e
-directory=$1
-tzif_list=$2
-
-truncate -s 0 $tzif_list
-
-for i in `find $directory -type f`; do
-    header=`head -c 4 $i`
-    if [ "$header" = "TZif" ]; then
-        echo "$i" >> $tzif_list
-    fi
-done
-
diff --git a/src/tzdb/CMakeLists.txt b/src/tzdb/CMakeLists.txt
index 33eb928..119002b 100644
--- a/src/tzdb/CMakeLists.txt
+++ b/src/tzdb/CMakeLists.txt
@@ -50,7 +50,7 @@ add_custom_command(
     OUTPUT
         ${BINARY_LIST_TXT}
     COMMAND
-        sh ${CMAKE_CURRENT_SOURCE_DIR}/generate_binary_list_txt.sh ${BINARY_LIST_TXT}
+        ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_SOURCE_DIR}/generate_binary_list_txt.cmake ${BINARY_LIST_TXT} ${PROJECT_SOURCE_DIR}/CMakeModules/list_directory.cmake
     WORKING_DIRECTORY
         ${NX_ZONEINFO_DIR})
 
diff --git a/src/tzdb/generate_binary_list_txt.cmake b/src/tzdb/generate_binary_list_txt.cmake
new file mode 100644
index 0000000..4edce75
--- /dev/null
+++ b/src/tzdb/generate_binary_list_txt.cmake
@@ -0,0 +1,48 @@
+set(BINARY_LIST_TXT ${CMAKE_ARGV3})
+set(LIST_DIR_CMAKE ${CMAKE_ARGV4})
+
+# Fill text file with zone names
+# Issue: Hyphens/underscores are not handled the same way Nintendo handles them
+function(get_files_nx TARG SUB_DIR)
+    execute_process(
+        COMMAND
+            ${CMAKE_COMMAND} -P ${LIST_DIR_CMAKE} false OFF
+        WORKING_DIRECTORY
+            ${TARG}
+        OUTPUT_VARIABLE
+            FILE_LIST
+    )
+    list(SORT FILE_LIST)
+    execute_process(
+        COMMAND
+            ${CMAKE_COMMAND} -P ${LIST_DIR_CMAKE} true OFF
+        WORKING_DIRECTORY
+            ${TARG}
+        OUTPUT_VARIABLE
+            DIR_LIST
+    )
+
+    foreach(FILE ${FILE_LIST})
+        if(FILE STREQUAL "\n")
+            continue()
+        endif()
+        list(REMOVE_ITEM DIR_LIST FILE)
+        if (SUB_DIR)
+            file(APPEND ${BINARY_LIST_TXT} "${SUB_DIR}/${FILE}\r\n")
+        else()
+            file(APPEND ${BINARY_LIST_TXT} "${FILE}\r\n")
+        endif()
+    endforeach()
+
+    list(SORT DIR_LIST)
+
+    foreach(DIR ${DIR_LIST})
+        if (NOT DIR OR DIR STREQUAL "\n")
+            continue()
+        endif()
+        get_files_nx(${TARG}/${DIR} ${DIR})
+    endforeach()
+endfunction()
+
+get_files_nx(${CMAKE_SOURCE_DIR} "")
+
diff --git a/src/tzdb/generate_binary_list_txt.sh b/src/tzdb/generate_binary_list_txt.sh
deleted file mode 100644
index 6cc80f9..0000000
--- a/src/tzdb/generate_binary_list_txt.sh
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/bin/sh
-BINARY_LIST_TXT="$1"
-
-# Fill text file with zone names
-# Issue: Hyphens/underscores are not handled the same way Nintendo handles them
-get_files_nx() {
-    local target=$1
-    find $target -maxdepth 1 -type f -not -regex '.*Factory' | sort
-    local DIRS=`find $target -maxdepth 1 -type d | sort`
-    for i in $DIRS; do
-        if [ "`readlink -e $i`" = "`readlink -e $target`" ]; then
-            continue
-        fi
-        get_files_nx $i
-    done
-}
-
-get_files_nx . | cut -c3- > ${BINARY_LIST_TXT}
-
-# Convert LF to CRLF
-awk -v ORS='\r\n' 1 ${BINARY_LIST_TXT} > win
-# Overwrite LF with CRLF conversion
-mv win ${BINARY_LIST_TXT}