Unable to extract system dynamic libraries files

[dnne]

I tried to extract system dynamic libraries files using the command ./run_no_pack_fs iPhone5,1_9.3_13E237. However the extraction of libraries fails as shown in the output bellow:

$ ./run_no_pack_fs iPhone5,1_9.3_13E237
* Change working directory to scripts/
* Download firmware image
Firmware file already exists at .././ipsw/iPhone5,1_9.3_13E237_Restore.ipsw Do you want to continue?[y/N] Not continuing.
* Unpack firmware image
[debug] Creating folder .././out/iPhone5,1_9.3_13E237 if does not exist ...
[debug] Unpacking ipsw file .././ipsw/iPhone5,1_9.3_13E237_Restore.ipsw to .././out/iPhone5,1_9.3_13E237 ...
[debug] unzip -o -qq .././ipsw/iPhone5,1_9.3_13E237_Restore.ipsw -d .././out/iPhone5,1_9.3_13E237
* Decrypt disk image file
[debug] Change working directory to bin/
[debug] ./decrypt_fs .././out/iPhone5,1_9.3_13E237/058-25512-331.dmg 2a66fd6377af8f60d5e300ac3aa8d9c44a1c0dee94579ad3f8a26515debbf381bb971ae8
[debug] Decrypting dmg file .././out/iPhone5,1_9.3_13E237/058-25512-331.dmg to .././out/iPhone5,1_9.3_13E237/decrypted.dmg ...
[debug] ../tools/vfdecrypt/vfdecrypt -k2a66fd6377af8f60d5e300ac3aa8d9c44a1c0dee94579ad3f8a26515debbf381bb971ae8 -i.././out/iPhone5,1_9.3_13E237/058-25512-331.dmg -o.././out/iPhone5,1_9.3_13E237/decrypted.dmg
[info] macOS is able to attach and mount .dmg files. Not converting .././out/iPhone5,1_9.3_13E237/decrypted.dmg to .././out/iPhone5,1_9.3_13E237/rootfs.img
* Decrypt kernelcache
[debug] Change working directory to bin/
[debug] ./decrypt_kernel .././out/iPhone5,1_9.3_13E237/kernelcache.release.n41 17026ef62f8da01dc0f4e7d2b8b54d4c 4ca5ec9e8dc9c5f77412c699fe724a5bfe101a79e1f2134e53bbb990e62a8c96
[debug] Decrypting kernelcache file .././out/iPhone5,1_9.3_13E237/kernelcache.release.n41 to .././out/iPhone5,1_9.3_13E237/kernelcache.decrypted ...
[debug] ../tools/xpwn/builddir/ipsw-patch/xpwntool .././out/iPhone5,1_9.3_13E237/kernelcache.release.n41 .././out/iPhone5,1_9.3_13E237/kernelcache.decrypted -iv 17026ef62f8da01dc0f4e7d2b8b54d4c -k 4ca5ec9e8dc9c5f77412c699fe724a5bfe101a79e1f2134e53bbb990e62a8c96 -decrypt
[debug] Unpacking kernelcache file .././out/iPhone5,1_9.3_13E237/kernelcache.decrypted (offet 448) to .././out/iPhone5,1_9.3_13E237/kernelcache.mach.arm ...
[debug] ../tools/lzssdec/lzssdec -o 448 < .././out/iPhone5,1_9.3_13E237/kernelcache.decrypted > .././out/iPhone5,1_9.3_13E237/kernelcache.mach.arm
* Extract sandbox extension
[debug] Change working directory to bin/
[debug] ./extract_sandbox_extension .././out/iPhone5,1_9.3_13E237/kernelcache.mach.arm
[debug] Extracting sandbox extension from .././out/iPhone5,1_9.3_13E237/kernelcache.mach.arm to .././out/iPhone5,1_9.3_13E237/com.apple.security.sandbox.kext ...
[debug] ../tools/joker/joker.universal -K com.apple.security.sandbox .././out/iPhone5,1_9.3_13E237/kernelcache.mach.arm
* Mount root filesystem
Password:
[debug] Change working directory to bin/
[debug] ./mount_fs .././out/iPhone5,1_9.3_13E237/decrypted.dmg /mnt/ios/iPhone5,1_9.3_13E237
[debug] Mounting disk image file .././out/iPhone5,1_9.3_13E237/decrypted.dmg to /mnt/ios/iPhone5,1_9.3_13E237 ...
[debug] hdiutil attach -noverify -mountpoint /mnt/ios/iPhone5,1_9.3_13E237 .././out/iPhone5,1_9.3_13E237/decrypted.dmg
* Copy sandboxd
[info] There is no sandboxd file (/usr/libexec/sandboxd) in /mnt/ios/iPhone5,1_9.3_13E237
* Extract dynamic library cache
[debug] Change working directory to bin/
[debug] ./extract_dyld_shared_cache /mnt/ios/iPhone5,1_9.3_13E237//System/Library/Caches/com.apple.dyld/dyld_shared_cache_armv7s .././out/iPhone5,1_9.3_13E237/dyld_shared_cache
[debug] Extracting libraries from /mnt/ios/iPhone5,1_9.3_13E237//System/Library/Caches/com.apple.dyld/dyld_shared_cache_armv7s to .././out/iPhone5,1_9.3_13E237/dyld_shared_cache ...
[debug] ../tools/dyld/dsc_extractor /mnt/ios/iPhone5,1_9.3_13E237//System/Library/Caches/com.apple.dyld/dyld_shared_cache_armv7s .././out/iPhone5,1_9.3_13E237/dyld_shared_cache
[error] Previous command ended with error. Turn on debugging and run manually to investigate.
* Unmount root filesystem
[debug] Change working directory to bin/
[debug] ./unmount_fs /mnt/ios/iPhone5,1_9.3_13E237
[debug] Unmounting disks for mount point /mnt/ios/iPhone5,1_9.3_13E237 ...
[debug] hdiutil detach /dev/disk2
* Extract sandbox profiles
[debug] Change working directory to ../tools/sandblaster/helpers/
[debug] ./extract_sandbox_operations ../../.././out/iPhone5,1_9.3_13E237/com.apple.security.sandbox.kext 9.3 > ../../.././out/iPhone5,1_9.3_13E237/sb_ops
[debug] Change working directory to ../tools/sandblaster/helpers/
[debug] ./extract_sandbox_profiles ../../.././out/iPhone5,1_9.3_13E237/com.apple.security.sandbox.kext 9.3 ../../.././out/iPhone5,1_9.3_13E237/sandbox_bundle
[error] Previous command ended with error. Turn on debugging and run manually to investigate.
* Reverse sandbox profiles
[error] There is no sandbox_bundle file in .././out/iPhone5,1_9.3_13E237

I tried to look in dyld_shared_cache directory for any file but it was empty as shown bellow:

$ ls -al out/iPhone5,1_9.3_13E237/dyld_shared_cache/
total 0
drwxr-xr-x   2 test  staff   68 May 12 12:26 .
drwxr-xr-x  16 test  staff  544 May 12 12:26 ..