[FreeNX-kNX] How to compile FreeNX?

[Sandra Schlichting]

>> tar xzf ~/nxclient-3.5.0-7.x86_64.tar.gz
>> tar xzf ~/nxnode-3.5.0-7.x86_64.tar.gz
>> tar xzf ~/nxserver-3.5.0-9.x86_64.tar.gz
>> cd
>>
>
> The above files constitute
>
>         "NX Free Edition for Linux"
>
> from nomachine NOT FreeNX.
>
> If you unzip them in the correct place, you will have
> a fully functional nomachine NX, including the binaries.

I tried that, and got the output with errors I posted. E.g.

Error: expect necessary for /usr/NX/bin/nxnode-login could not be
found in '/usr/bin/expect'. Please install it or change nxnode-login
accordingly.
Error: Could not find 1.5.0 or 2.[01].0 or 3.[01].0 version string in
nxagent. NX 1.5.0 or 2.[01].0 or 3.[012].0 backend is needed for this
version of FreeNX.

At this point I hadn't "expect" installed. Could that be the reason
for the "nxagent" error just below it? I.e. the installation would
have worked if I had "expect"?