stamps/02-patch-stamp: No such file or directory

When I download source code of gcc from https://packages.ubuntu.com/groovy/gcc-8
and running fakeroot debian/rules binary

but It's reports that

Number of parallel processes used for the build: 1
DEB_BUILD_OPTIONS:
Package source: gcc-8
GCC version: 8.3.0
Base Debian version: 8
Configured with: -v
  --with-pkgversion='Ubuntu/Linaro 8.3.0-6'
  --with-bugurl='file:///usr/share/doc/gcc-8/README.Bugs'
  --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++
  --prefix=/usr
  --with-gcc-major-version-only
  --program-suffix=-8
  --program-prefix=aarch64-linux-gnu-
  --enable-shared
  --enable-linker-build-id
  --libexecdir=/usr/lib
  --without-included-gettext
  --enable-threads=posix
  --libdir=/usr/lib
  --enable-nls
  --enable-bootstrap
  --enable-clocale=gnu
  --enable-libstdcxx-debug
  --enable-libstdcxx-time=yes
  --with-default-libstdcxx-abi=new
  --enable-gnu-unique-object
  --disable-libquadmath
  --disable-libquadmath-support
  --enable-plugin
  --enable-default-pie
  --with-system-zlib
  --disable-libphobos
  --enable-multiarch
  --enable-fix-cortex-a53-843419
  --disable-werror
  --enable-checking=release
  --build=aarch64-linux-gnu
  --host=aarch64-linux-gnu
  --target=aarch64-linux-gnu

Using shell /bin/bash -e
Architecture: arm64 (GNU: aarch64-linux-gnu)
CPPFLAGS:
CFLAGS:
LDFLAGS:
BOOT_CFLAGS: -g -O2 -fno-stack-protector
DEBIAN_BUILDARCH:
Install prefix: /usr
Will not build the biarch compilers
Will build the C++ compiler
Will build the ObjC compiler.
Will not build the extra ObjC runtime for garbage collection.
Will build the Obj-C++ compiler
Will build the Fortran 95 compiler.
Will build the Ada compiler.
Will build the shared Ada libraries.
Will build the Go compiler.
Will build the D compiler
Will not build the phobos D runtime library: disabled for cpu arm64
Will build with SSP support.
Will run the testsuite.
Will enable national language support.
-----------------------------------------------------------------------------

rm -f stamps/04-configure-stamp stamps/05-build-stamp
cat debian/README.Debian stamps/02-patch-stamp > debian/README.Debian.arm64
cat: stamps/02-patch-stamp: No such file or directory
make[1]: *** [debian/rules2:1084: stamps/04-configure-stamp] Error 1
make[1]: Leaving directory '/home/ubuntu/gcc-8-8.3.0/gcc-8.3.0'
make: *** [debian/rules:70: binary] Error 2

There is no stamps in any directories