Error during build of apt-rpm

[sadoulet@…]

I had the following error when building apt-rpm on my Mac PowerPC running OS X 10.4.11 Darwin 8.11:

sudo port -v install apt-rpm
Password:
--->  Building apt-rpm with target all
Making all in lua
make[1]: execvp: ../buildlib/install-sh: Permission denied
make[1]: *** [local/.dirstamp] Error 127
make: *** [all-recursive] Error 1
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_sysutils_apt-rpm/work/apt-0.5.15lorg3.93" && make all " returned error 2
Command output: Making all in lua
make[1]: execvp: ../buildlib/install-sh: Permission denied
make[1]: *** [local/.dirstamp] Error 127
make: *** [all-recursive] Error 1

I have checked that install-sh is owned by root admin, which should have been OK because of the sudo command.
Any advice?