Error gopath -

ahmed@ahmed-Charafouddine:~/go/src/github.com/ahmed/lsbeat$ 
make
go build 
main.go:8:2: cannot find package 
 "github.com/charafouddineahmed/lsbeat/beater" in any of:
/home/ahmed/go/src/github.com/ahmed/lsbeat/vendor/github.com/charafouddineahmed/lsbeat/beater (vendor tree)
/usr/lib/go/src/github.com/charafouddineahmed/lsbeat/beater (from $GOROOT)
/home/ahmed/go/src/github.com/charafouddineahmed/lsbeat/beater (from $GOPATH)
  vendor/github.com/elastic/beats/libbeat/scripts/Makefile:76 : la recette pour la cible « lsbeat » a échouée

make: *** [lsbeat] Erreur 1