[Nix-dev] synaptics touchpad problem in trunk

[Tony White]

Hi,
I'd really like appreciate some advice on how to solve the synaptics
touch pad problem in trunk, if anyone has an idea about what's going
wrong?

      synaptics = {
       enable = true;
       };

Is in /etc/configuration.nix and the output of nixos-rebuild switch
fails like this :

synaptics.c:784: warning: implicit declaration of function 'xf86write'
synaptics.c: In function 'SelectTapButton':
synaptics.c:952: warning: left-hand operand of comma expression has no
effect
synaptics.c:956: warning: left-hand operand of comma expression has no
effect
synaptics.c:960: warning: left-hand operand of comma expression has no
effect
synaptics.c:964: warning: left-hand operand of comma expression has no
effect
synaptics.c:968: warning: left-hand operand of comma expression has no
effect
synaptics.c:974: warning: left-hand operand of comma expression has no
effect
synaptics.c:978: warning: left-hand operand of comma expression has no effect
synaptics.c: In function 'SetTapState':
synaptics.c:991: warning: left-hand operand of comma expression has no effect
synaptics.c: In function 'ComputeDeltas':
synaptics.c:1280: warning: implicit declaration of function 'xf86modf'
synaptics.c: In function 'HandleScrolling':
synaptics.c:1385: warning: left-hand operand of comma expression has no effect
synaptics.c:1393: warning: left-hand operand of comma expression has no effect
synaptics.c:1398: warning: left-hand operand of comma expression has no effect
synaptics.c:1406: warning: left-hand operand of comma expression has no effect
synaptics.c:1412: warning: left-hand operand of comma expression has no effect
synaptics.c:1422: warning: left-hand operand of comma expression has no effect
synaptics.c:1428: warning: left-hand operand of comma expression has no effect
synaptics.c:1432: warning: left-hand operand of comma expression has no effect
synaptics.c:1438: warning: left-hand operand of comma expression has no effect
synaptics.c:1442: warning: left-hand operand of comma expression has no effect
synaptics.c:1461: warning: left-hand operand of comma expression has no effect
synaptics.c:1472: warning: left-hand operand of comma expression has no effect
synaptics.c: In function 'ControlProc':
synaptics.c:1779: warning: left-hand operand of comma expression has no effect
synaptics.c: In function 'CloseProc':
synaptics.c:1787: warning: left-hand operand of comma expression has no effect
make: *** [synaptics.o] Error 1
builder for `/nix/store/jzp2vvsna5aj21bq7pw2wgkg0nx6lf31-synaptics-0.14.6.drv'
failed with exit code 2
building path(s) `/nix/store/90073pvrzb78samg6vynd3pv1k31n877-xserver.conf'
cannot build derivation
`/nix/store/gmnin2xw8hv8njqx4h6n6p4rrkf5dxck-xserver.conf.drv': 1
dependencies couldn't be built
cannot build derivation
`/nix/store/6p4qpvxrn33vsn19sza26fknr08jprmp-kdmrc.drv': 1
dependencies couldn't be built
cannot build derivation
`/nix/store/178kiigvv60wrph431x5ms84ki9sb1lq-upstart-kdm.drv': 1
dependencies couldn't be built
cannot build derivation
`/nix/store/4jv35zz5kdnnxzv624lb2lgn76z2m6c6-upstart-jobs.drv': 1
dependencies couldn't be built
cannot build derivation
`/nix/store/8mfhnsfmjvs54mgyz44n9agcxqd9757g-etc.drv': 1 dependencies
couldn't be built
cannot build derivation
`/nix/store/6m1r2av40yn1x8hqkyac0r0pzf0lxzl0-system.drv': 1
dependencies couldn't be built
error: build of `/nix/store/6m1r2av40yn1x8hqkyac0r0pzf0lxzl0-system.drv' failed

Any advice would be greatly appreciated.

Thanks,
Tony