diff --git a/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev.pack b/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev1.pack
similarity index 92%
rename from env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev.pack
rename to env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev1.pack
index 5fbc03622..c62961010 100644
Binary files a/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev.pack and b/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev1.pack differ
diff --git a/env_support/cmsis-pack/LVGL.lvgl.pdsc b/env_support/cmsis-pack/LVGL.lvgl.pdsc
index c4e9a56f2..86d2d63cf 100644
--- a/env_support/cmsis-pack/LVGL.lvgl.pdsc
+++ b/env_support/cmsis-pack/LVGL.lvgl.pdsc
@@ -36,7 +36,7 @@
   <repository type="git">https://github.com/lvgl/lvgl.git</repository>
 
   <releases>
-    <release date="2023-12-10" version="9.0.0-dev" url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev.pack">
+    <release date="2023-12-12" version="9.0.0-dev1" url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/LVGL.lvgl.9.0.0-dev1.pack">
       - LVGL 9.0.0-dev
       - New Driver Architecture
       - Other fixes
@@ -430,7 +430,6 @@
                 <!-- src/draw/sw -->
                 <file category="sourceC"            name="src/draw/sw/lv_draw_sw.c" />
                 <file category="sourceC"            name="src/draw/sw/lv_draw_sw_arc.c" />
-                <file category="sourceC"            name="src/draw/sw/lv_draw_sw_bg_img.c" />
                 <file category="sourceC"            name="src/draw/sw/lv_draw_sw_border.c" />
                 <file category="sourceC"            name="src/draw/sw/lv_draw_sw_box_shadow.c" />
                 <file category="sourceC"            name="src/draw/sw/lv_draw_sw_fill.c" />
diff --git a/env_support/cmsis-pack/LVGL.pidx b/env_support/cmsis-pack/LVGL.pidx
index dc34b1f58..a919885df 100644
--- a/env_support/cmsis-pack/LVGL.pidx
+++ b/env_support/cmsis-pack/LVGL.pidx
@@ -2,8 +2,8 @@
 <index schemaVersion="1.0.0" xs:noNamespaceSchemaLocation="PackIndex.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
   <vendor>LVGL</vendor>
   <url>https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/</url>
-  <timestamp>2023-12-10</timestamp>
+  <timestamp>2023-12-12</timestamp>
   <pindex>
-    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="9.0.0-dev"/>
+    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="9.0.0-dev1"/>
   </pindex>
 </index>
diff --git a/env_support/cmsis-pack/gen_pack.sh b/env_support/cmsis-pack/gen_pack.sh
index c094311be..4fab5f22a 100755
--- a/env_support/cmsis-pack/gen_pack.sh
+++ b/env_support/cmsis-pack/gen_pack.sh
@@ -161,7 +161,8 @@ done
 # pdsc file is mandatory in base directory:
 cp -f  ./$PACK_VENDOR.$PACK_NAME.pdsc ${PACK_BUILD}
 cp -f ../../examples/porting/* ${PACK_BUILD}/examples/porting
-cp -f ./lv_os_custom.* ${PACK_BUILD}/src/osal
+cp -f ./lv_os_custom_c.txt ${PACK_BUILD}/src/osal/lv_os_custom.c
+cp -f ./lv_os_custom_h.txt ${PACK_BUILD}/src/osal/lv_os_custom.h
 
 mv "${PACK_BUILD}/lv_cmsis_pack.txt" "${PACK_BUILD}/lv_cmsis_pack.c"
 
diff --git a/env_support/cmsis-pack/lv_os_custom.c b/env_support/cmsis-pack/lv_os_custom_c.txt
similarity index 100%
rename from env_support/cmsis-pack/lv_os_custom.c
rename to env_support/cmsis-pack/lv_os_custom_c.txt
diff --git a/env_support/cmsis-pack/lv_os_custom.h b/env_support/cmsis-pack/lv_os_custom_h.txt
similarity index 100%
rename from env_support/cmsis-pack/lv_os_custom.h
rename to env_support/cmsis-pack/lv_os_custom_h.txt