diff --git a/.github/workflows/clean-build.yml b/.github/workflows/clean-build.yml
index f3bb7a8..f70f0b4 100644
--- a/.github/workflows/clean-build.yml
+++ b/.github/workflows/clean-build.yml
@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           repository: micropython/micropython
-          ref: v1.28.0
+          ref: v1.29.0
           path: micropython
 
       # A unix build cannot show this one: the Makefile ports fold
@@ -106,7 +106,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           repository: micropython/micropython
-          ref: v1.28.0
+          ref: v1.29.0
           path: micropython
 
       # Pinned to the lvgl-bindings commit that turns LV_USE_TJPGD off on
@@ -118,7 +118,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           repository: PyDevices/lvgl-bindings
-          ref: aa6c6bc449aed6936b644ab45b11e453945a18ee
+          ref: d5f3d341e6bcfc97d52d66f776587c215c95ff4d
           path: lvgl-bindings
           submodules: true
 
@@ -126,7 +126,7 @@ jobs:
         uses: actions/checkout@v7
         with:
           repository: PyDevices/lvgl-micropython
-          ref: d7ea1938a6d53cd03a6559f9f46fc7f07f7c2300
+          ref: 410e2e8dcf38e316f5da7bc63b35ba4b3fd07dfd
           path: lvgl-micropython
 
       - name: Install SDL2
@@ -135,17 +135,19 @@ jobs:
           sudo apt-get install -y libsdl2-dev
 
       - name: Build the unix port with displayif + lvgl-micropython + lvgl-bindings
-        # USER_C_MODULES is the PARENT directory again; displayif's jpegio
-        # sees $(USER_C_MODULES)/lvgl-micropython/micropython.mk and compiles
-        # its LVGL decoder. FROZEN_MANIFEST freezes lvgl-micropython's
+        # Both modules are named by their own manifests (MicroPython 1.29
+        # c_module()), so a two-line manifest selects them and there is no
+        # USER_C_MODULES: passing the parent directory as well would include
+        # each module twice. FROZEN_MANIFEST also freezes lvgl-micropython's
         # display_driver.py / fs_driver.py (the file-source test uses the
-        # latter), the same command the local proof used.
+        # latter). jpegio sees lvgl-micropython in USER_C_MODULES (appended by
+        # the manifest) and compiles its LVGL decoder.
         run: |
+          printf 'include("displayif/manifest.py")\ninclude("lvgl-micropython/manifest.py")\n' > ci-manifest.py
           make -C micropython/mpy-cross -j2
           make -C micropython/ports/unix submodules
           make -C micropython/ports/unix -j2 \
-            USER_C_MODULES=$GITHUB_WORKSPACE \
-            FROZEN_MANIFEST=$GITHUB_WORKSPACE/lvgl-micropython/manifest.py
+            FROZEN_MANIFEST=$GITHUB_WORKSPACE/ci-manifest.py
 
       - name: One TJpgDec in the firmware, and it is jpegio's
         # Exactly one object defines jd_prepare (displayif's tjpgd.o; LVGL's
diff --git a/manifest.py b/manifest.py
new file mode 100644
index 0000000..8a7b77a
--- /dev/null
+++ b/manifest.py
@@ -0,0 +1,4 @@
+# Freeze manifest for this repo. Nothing Python to freeze here; the line below
+# names the C module so a build that includes this manifest compiles it
+# (MicroPython 1.29 c_module()).
+c_module(".")  # this directory holds the micropython.cmake / micropython.mk for the C half
diff --git a/src/jpegio/micropython.mk b/src/jpegio/micropython.mk
index c5d1a99..50a0786 100644
--- a/src/jpegio/micropython.mk
+++ b/src/jpegio/micropython.mk
@@ -18,10 +18,12 @@ SRC_USERMOD_C += $(JPEGIO_DIR)/jpegio.c
 # Library source: no qstrs, so it stays out of the QSTR scan.
 SRC_USERMOD_LIB_C += $(JPEGIO_DIR)/tjpgd/tjpgd.c
 
-# Sibling detection is exactly py.mk's usermod glob, one level under
-# USER_C_MODULES (works with a relative USER_C_MODULES too). Override with
-# JPEGIO_LVGL=0/1 on the make command line.
-JPEGIO_LVGL ?= $(if $(wildcard $(USER_C_MODULES)/lvgl-micropython/micropython.mk),1,0)
+# lvgl-micropython is in this build if USER_C_MODULES names it -- either as a
+# module directory itself (MicroPython 1.29 c_module()) or as a parent
+# directory one level above it (py.mk's glob). Override with JPEGIO_LVGL=0/1
+# on the make command line.
+JPEGIO_LVMP_DIR := $(firstword $(filter %/lvgl-micropython,$(USER_C_MODULES:/=)) $(foreach d,$(USER_C_MODULES),$(wildcard $(d)/lvgl-micropython)))
+JPEGIO_LVGL ?= $(if $(JPEGIO_LVMP_DIR),1,0)
 
 ifeq ($(JPEGIO_LVGL),1)
 # The bindings checkout, derived the way lvgl-micropython/micropython.mk does
@@ -30,7 +32,7 @@ ifeq ($(JPEGIO_LVGL),1)
 # lvgl-micropython's, so a `BINDINGS_DIR ?=` here would pre-empt theirs. A
 # BINDINGS_DIR given on the make command line is honoured so both usermods
 # compile against the same lv_conf.h (struct layouts depend on it).
-JPEGIO_LVGL_BINDINGS_DIR ?= $(or $(BINDINGS_DIR),$(abspath $(USER_C_MODULES)/lvgl-micropython/../lvgl-bindings))
+JPEGIO_LVGL_BINDINGS_DIR ?= $(or $(BINDINGS_DIR),$(abspath $(JPEGIO_LVMP_DIR)/../lvgl-bindings))
 # -I<bindings> finds lv_conf.h (LVGL's lv_conf_internal.h picks it up through
 # __has_include, the same route lvgl-micropython's -I$(BINDINGS_DIR) uses);
 # -I<bindings>/lvgl finds lvgl.h and the src/... private headers.
@@ -40,5 +42,5 @@ SRC_USERMOD_LIB_C += $(JPEGIO_DIR)/lvgl_decoder.c
 # lvgl.h with LV_USE_FLOAT trips -Werror=double-promotion / float-conversion
 # on ports that append those after CFLAGS_USERMOD (unix, webassembly): the
 # same per-object suppression lvgl-micropython puts on LVGL's own objects.
-$(eval $(BUILD)/$(patsubst $(USER_C_MODULES)/%,%,$(JPEGIO_DIR)/lvgl_decoder.o): CFLAGS += -Wno-double-promotion -Wno-float-conversion)
+$(eval $(BUILD)/$(patsubst $(DISPLAYIF_MOD_DIR)/%,$(notdir $(DISPLAYIF_MOD_DIR))/%,$(JPEGIO_DIR)/lvgl_decoder.o): CFLAGS += -Wno-double-promotion -Wno-float-conversion)
 endif