Compilation of version 3.20.1 fails with gcc 13.2

The error message below. Full log attached

          CC installed-arch-linux2-c-debug-complex/obj/installed-arch-linux2-c-debug-complex/src/pep/interface/ftn-auto/pepsetupf.o
          CC installed-arch-linux2-c-debug-complex/obj/installed-arch-linux2-c-debug-complex/src/pep/interface/ftn-auto/pepsolvef.o
          CC installed-arch-linux2-c-debug-complex/obj/installed-arch-linux2-c-debug-complex/src/pep/interface/ftn-auto/pepviewf.o
          FC installed-arch-linux2-c-debug-complex/obj/src/nep/f90-mod/slepcnepmod.o
/work/mo_user/yambo-compilation/bug-fixes/gfortran/lib/slepc/slepc-3.20.1/src/nep/f90-mod/slepcnepmod.F90:61:13:

   61 |         use slepcmfn
      |             1
Fatal Error: Cannot open module file ‘slepcmfn.mod’ for reading at (1): No such file or directory
compilation terminated.
gmake[6]: *** [gmakefile:220: installed-arch-linux2-c-debug-complex/obj/src/nep/f90-mod/slepcnepmod.o] Error 1
gmake[5]: *** [makefile:79: slepc_libs] Error 2
*******************************ERROR************************************
  Error during compile, check installed-arch-linux2-c-debug-complex/lib/slepc/conf/make.log
  Send all contents of ./installed-arch-linux2-c-debug-complex/lib/slepc/conf to slepc-maint@upv.es
************************************************************************
gmake[4]: *** [makefile:51: all] Error 1
make[3]: *** [GNUmakefile:4: all] Error 2

compile_slepc-3.20.1.log