Hi, I'm trying to build the wallet on linux (really a newbie) and following the instructions on github but I'm getting this error:

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sudo make
cd /home/giampi/galaxycash/src/leveldb && CC=gcc CXX=g++ make OPT="-m64 -pipe -fstack-protector-all --param ssp-buffer-size=1 -O2" libleveldb.a libmemenv.a
make[1]: Entering directory '/home/beppe/galaxycash/src/leveldb'
/bin/sh: 1: ./build_detect_platform: Permission denied
Makefile:18: build_config.mk: No such file or directory
make[1]: *** No rule to make target 'build_config.mk'.  Stop.
make[1]: Leaving directory '/home/giampi/galaxycash/src/leveldb'

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I believe that I've installed all the needed dependency but I'm doing something wrong.....
Can somebody help?