diff --git a/tools/build_all_firmwares.sh b/tools/build_all_firmwares.sh
index f4b23378c..87c95033f 100755
--- a/tools/build_all_firmwares.sh
+++ b/tools/build_all_firmwares.sh
@@ -10,6 +10,8 @@ echo "Produce stats?: ${STATS:=false}"
 SKIPS256="SKIP_HITAG=1"
 
 make $MKFLAGS bootrom || exit 1
+chmod 644 bootrom/obj/bootrom.elf
+mkdir -p "$DEST"
 mv bootrom/obj/bootrom.elf "$DEST/PM3BOOTROM.elf"
 
 # cf armsrc/Standalone/Makefile.hal
@@ -23,11 +25,13 @@ STANDALONE_MODES_REQ_FLASH=(LF_HIDFCBRUTE LF_ICEHID LF_NEXID LF_THAREXDE HF_14AS
 
 # Need to use the "recovery" target to test the size
 make $MKFLAGS PLATFORM=PM3GENERIC PLATFORM_SIZE=256 PLATFORM_EXTRAS= STANDALONE= $SKIPS256 recovery || exit 1
+chmod 644 armsrc/obj/fullimage.elf
 mv armsrc/obj/fullimage.elf "$DEST/PM3GENERIC_256.elf"
 
 # PM3GENERIC, no flash
 
 make $MKFLAGS PLATFORM=PM3GENERIC PLATFORM_EXTRAS= STANDALONE= fullimage || exit 1
+chmod 644 armsrc/obj/fullimage.elf
 mv armsrc/obj/fullimage.elf "$DEST/PM3GENERIC.elf"
 $STATS && ( echo "PM3GENERIC:" > standalones_stats.txt )
 $STATS && ( echo "   text	   data	    bss	    dec	    hex	filename" >> standalones_stats.txt )
@@ -36,6 +40,7 @@ for mode in "${STANDALONE_MODES[@]}"; do
   [[ " ${STANDALONE_MODES_REQ_SMARTCARD[*]} " =~ " $mode " ]] && continue
   [[ " ${STANDALONE_MODES_REQ_FLASH[*]} " =~ " $mode " ]] && continue
   make $MKFLAGS PLATFORM=PM3GENERIC PLATFORM_EXTRAS= STANDALONE=$mode fullimage || exit 1
+  chmod 644 armsrc/obj/fullimage.elf
   mv armsrc/obj/fullimage.elf "$DEST/PM3GENERIC_${mode/_/}.elf"
   $STATS && ( LANG=C arm-none-eabi-size armsrc/obj/[hl]f_*.o |grep -v "filename" >> standalones_stats.txt )
 done
@@ -43,12 +48,14 @@ done
 # PM3RDV4
 
 make $MKFLAGS PLATFORM=PM3RDV4 PLATFORM_EXTRAS= STANDALONE= fullimage || exit 1
+chmod 644 armsrc/obj/fullimage.elf
 mv armsrc/obj/fullimage.elf "$DEST/PM3RDV4.elf"
 $STATS && ( echo "PM3RDV4:" >> standalones_stats.txt )
 $STATS && ( echo "   text	   data	    bss	    dec	    hex	filename" >> standalones_stats.txt )
 for mode in "${STANDALONE_MODES[@]}"; do
   [[ " ${STANDALONE_MODES_REQ_BT[*]} " =~ " $mode " ]] && continue
   make $MKFLAGS PLATFORM=PM3RDV4 PLATFORM_EXTRAS= STANDALONE=$mode fullimage || exit 1
+  chmod 644 armsrc/obj/fullimage.elf
   mv armsrc/obj/fullimage.elf "$DEST/PM3RDV4_${mode/_/}.elf"
   $STATS && ( LANG=C arm-none-eabi-size armsrc/obj/[hl]f_*.o |grep -v "filename" >> standalones_stats.txt )
 done
@@ -56,11 +63,13 @@ done
 # PM4RDV4 + BTADDON
 
 make $MKFLAGS PLATFORM=PM3RDV4 PLATFORM_EXTRAS=BTADDON STANDALONE= fullimage || exit 1
+chmod 644 armsrc/obj/fullimage.elf
 mv armsrc/obj/fullimage.elf "$DEST/PM3RDV4_BTADDON.elf"
 $STATS && ( echo "PM3RDV4 + BTADDON:" >> standalones_stats.txt )
 $STATS && ( echo "   text	   data	    bss	    dec	    hex	filename" >> standalones_stats.txt )
 for mode in "${STANDALONE_MODES[@]}"; do
   make $MKFLAGS PLATFORM=PM3RDV4 PLATFORM_EXTRAS=BTADDON STANDALONE=$mode fullimage || exit 1
+  chmod 644 armsrc/obj/fullimage.elf
   mv armsrc/obj/fullimage.elf "$DEST/PM3RDV4_BTADDON_${mode/_/}.elf"
   $STATS && ( LANG=C arm-none-eabi-size armsrc/obj/[hl]f_*.o |grep -v "filename" >> standalones_stats.txt )
 done