chamo tries to install itself outside the prefix about opam-repository HOT 3 CLOSED

==== ERROR [while installing chamo.2.01] ====
# command         make install
# path            /home/matthieu/.opam/system/build/chamo.2.01
# exit-code       2
# env-file        /home/matthieu/.opam/system/build/chamo.2.01/chamo-6d07ae.env
# stdout-file     /home/matthieu/.opam/system/build/chamo.2.01/chamo-6d07ae.out
# stderr-file     /home/matthieu/.opam/system/build/chamo.2.01/chamo-6d07ae.err
### stdout ###
cd src && make install
make[1]: Entering directory `/home/matthieu/.opam/system/build/chamo.2.01/src'
/home/matthieu/.opam/system/bin/ocamlfind install chamo ../META \\
        chamo.cmxa chamo.a ed_extern.cmi ed_xml.cmi ed_utf8.cmi ed_gtk_misc.cmi 
ed_annot.cmi multiclip.cmi multiclip_gui.cmi ed_constant.cmi ed_installation.cmi
 ed_config.cmi ed_dbg.cmi ed_hooks.cmi ed_rc.cmi ed_com_history.cmi ed_commands.
cmi ed_messages.cmi ed_prefs.cmi ed_gui_base.cmi ed_keymaps.cmi ed_gui_rc.cmi ed
_bookmarks.cmi ed_fstack.cmi ed_sourceview_rc.cmi ed_minibuffer_rc.cmi ed_minibu
ffer.cm...[truncated]
        ed_main.cmx ed_main.cmo ed_main.cmi \\
        ed_main.o *.mli
make[1]: Leaving directory `/home/matthieu/.opam/system/build/chamo.2.01/src'
### stderr ###
...[truncated]
Installed /home/matthieu/.opam/system/lib/chamo/ed_xml.cmi
Installed /home/matthieu/.opam/system/lib/chamo/ed_extern.cmi
Installed /home/matthieu/.opam/system/lib/chamo/chamo.a
Installed /home/matthieu/.opam/system/lib/chamo/chamo.cmxa
Installed /home/matthieu/.opam/system/lib/chamo/META
cp: cannot create regular file /usr/bin/chamo: Permissio
n denied
cp: cannot create regular file /usr/bin/chamo.byte: Perm
ission denied
cp: cannot create regular file /usr/bin/mk-chamo: Permis
sion denied
make[1]: *** [install] Error 1