diff --git a/Dockerfile b/Dockerfile
index 7dbdd897..ce89d63e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,12 +3,12 @@ FROM wombatant/devenv:latest
 ENV DEVKITPRO /opt/devkitPro
 ENV DEVKITARM ${DEVKITPRO}/devkitARM
 
-RUN dnf install -y qt5-devel
+RUN dnf install -y qt5-devel llvm libasan
 
 ###############################################################################
 # Install Ox
 
-RUN git clone -b release-0.1 https://github.com/wombatant/ox.git /usr/local/src/ox && \
+RUN git clone -b e976fd3fe62c98be29c4389ba6700a4a1fb8e0ae https://github.com/wombatant/ox.git /usr/local/src/ox && \
     cd /usr/local/src/ox && \
 	 # setup build dirs
     mkdir -p \
diff --git a/Makefile b/Makefile
index aaaacbb4..37bf3edf 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,9 @@ endif
 
 make:
 	${ENV_RUN} make -j -C build HOST_ENV=${HOST_ENV}
+build_rom:
+	${ENV_RUN} make -j -C build HOST_ENV=${HOST_ENV}
+	${ENV_RUN} ./build_rom.sh
 preinstall:
 	${ENV_RUN} make -j -C build ARGS="preinstall" HOST_ENV=${HOST_ENV}
 install:
@@ -31,12 +34,13 @@ gdb: make
 devenv-build:
 	docker build --no-cache . -t ${DEVENV_IMAGE}
 devenv:
-	docker run -d -v $(shell pwd):/usr/src/project \
+	docker run -d \
 		-e LOCAL_USER_ID=$(shell id -u ${USER}) \
 		-e DISPLAY=$(DISPLAY) \
 		-e QT_AUTO_SCREEN_SCALE_FACTOR=1 \
 		-v /tmp/.X11-unix:/tmp/.X11-unix \
 		-v /run/dbus/:/run/dbus/ \
+		-v $(shell pwd):/usr/src/project \
 		-v /dev/shm:/dev/shm \
 		--restart=always \
 		--name ${DEVENV} \
diff --git a/build_rom.sh b/build_rom.sh
index cf25db89..b6e1671d 100755
--- a/build_rom.sh
+++ b/build_rom.sh
@@ -2,9 +2,11 @@
 
 set -e
 
-padbin 32 build/gba-release/src/player/nostalgia.bin
+${DEVKITARM}/bin/padbin 32 build/gba-release/src/player/nostalgia.bin
 echo NOSTALGIA_MEDIA_HEADER_________ > media_header.txt
+
 oxfs format 32 1m nostalgia_media.oxfs
 ./build/current/src/tools/nost-pack -fs nostalgia_media.oxfs -img charset.png -inode 1 -tiles 40 -c
+
 cat build/gba-release/src/player/nostalgia.bin media_header.txt nostalgia_media.oxfs > nostalgia.gba
-gbafix nostalgia.gba
+${DEVKITARM}/bin/gbafix nostalgia.gba
diff --git a/src/core/gba/gba.hpp b/src/core/gba/gba.hpp
index 4e3fdd04..4c5d0e80 100644
--- a/src/core/gba/gba.hpp
+++ b/src/core/gba/gba.hpp
@@ -13,15 +13,15 @@
 namespace nostalgia {
 namespace core {
 
-typedef struct { uint32_t data[8]; } Tile, Tile4;
+typedef struct { uint32_t data[8]; } __attribute__((aligned(4))) Tile, Tile4;
 // d-tile: double-sized tile (8bpp)
-typedef struct { uint32_t data[16]; } Tile8;
+typedef struct { uint32_t data[16]; }  __attribute__((aligned(4))) Tile8;
 // tile block: 32x16 tiles, 16x16 d-tiles
 typedef uint16_t Pallete[256];
 typedef Tile  CharBlock[512];
 typedef Tile8 CharBlock8[256];
 
-struct GbaImageData {
+struct __attribute__((packed)) GbaImageData {
 	Pallete pal;
 	uint16_t tileCount;
 	uint8_t bpp;
diff --git a/src/core/gba/gfx.cpp b/src/core/gba/gfx.cpp
index 21c4754c..342ee0d1 100644
--- a/src/core/gba/gfx.cpp
+++ b/src/core/gba/gfx.cpp
@@ -133,7 +133,7 @@ void initConsole() {
 	REG_BG0CNT |= (1 << 7); // set to use 8 bits per pixel
 	if (fs) {
 		FileStore32::FsSize_t readSize = 0;
-		fs->read(1, 516, 64 * 38, &TILE8_ADDR[0][1], nullptr);
+		fs->read(2, __builtin_offsetof(GbaImageData, tiles), 64 * 38, &TILE8_ADDR[0][1], nullptr);
 		fs->read(1, 0, 512, &MEM_PALLETE_BG[0], &readSize);
 	}
 }
diff --git a/src/core/gba/media.cpp b/src/core/gba/media.cpp
index cd5af72f..35695551 100644
--- a/src/core/gba/media.cpp
+++ b/src/core/gba/media.cpp
@@ -22,7 +22,7 @@ uint8_t *findMedia() {
 	const static auto headerP1Len = 15;
 	const static auto headerP2Len = 16;
 	const static auto headerLen = headerP1Len + headerP2Len + 1;
-	
+
 	for (auto current = &MEM_ROM; current < ((uint8_t*) 0x0a000000); current += headerLen) {
 		if (ox_memcmp(current, headerP1, headerP1Len) == 0 &&
 		    ox_memcmp(current + headerP1Len, headerP2, headerP2Len) == 0) {
diff --git a/src/tools/pack.cpp b/src/tools/pack.cpp
index 0f64bddb..60d09e46 100644
--- a/src/tools/pack.cpp
+++ b/src/tools/pack.cpp
@@ -73,8 +73,9 @@ int run(ClArgs args) {
 		}
 
 		QMap<QRgb, int> colors;
-		const auto imgDataBuffSize = sizeof(Pallete) + argTiles * 64;
+		const auto imgDataBuffSize = sizeof(GbaImageData) + 1 + argTiles * 64;
 		uint8_t imgDataBuff[imgDataBuffSize];
+		memset(&imgDataBuff, 0, imgDataBuffSize);
 		GbaImageData *id = (GbaImageData*) imgDataBuff;
 		id->bpp = 8;
 		id->tileCount = argTiles;
@@ -90,7 +91,7 @@ int run(ClArgs args) {
 						colors[c] = colorId;
 						colorId++;
 					}
-					((uint8_t*) &id->tiles)[destI] = colors[c];
+					id->tiles[destI] = colors[c];
 				}
 			}
 		}