On 10 August 2015 at 20:16, Thompson, David <dthompson2@worcester.edu>
wrote:
>
> I believe this is because the return value of
> 'xorg-configuration-file' is a monadic value, and thus it needs to
> "unwrapped" in order to pass the configuration file to
> 'xorg-start-command'.
>
> Try this:
>
>     (mlet %store-monad ((config
>                          (xorg-configuration-file #:drivers '("radeon"
> "vesa")
>                                                   #:resolutions '((1366
> 768)
>                                                                   (1024
> 768)))))
>       (slim-service #:startx (xorg-start-command #:configuration-file
> config)))
>

I've tried this

  (services (cons*
(mlet %store-monad ((config
  (xorg-configuration-file #:drivers '("radeon" "vesa")
                           #:resolutions '((1366 768) (1024 768)))))
(slim-service #:startx (xorg-start-command
#:configuration-file config)))
                   ;;%desktop-services
                   %base-services))

But still failed

substitute: updating list of substitutes from 'http://hydra.gnu.org'...
100.0%
The following derivations will be built:
   /gnu/store/w95zdcd070xgpgbldfmij9b7m0v3px9g-system.drv
   /gnu/store/11vwx7pidb683ip9p9r0xg24h2d96pxf-grub.cfg.drv
   /gnu/store/4fmkwv683rhfc2397255s54nwggxfkmw-slim.cfg.drv
   /gnu/store/sxp6xg8wa71klwafyxdj8iwymphla81s-dmd.conf.drv
   /gnu/store/1d7bw0ga0f23rbb40zi45ql9w96nx2b8-boot.drv
   /gnu/store/vc4vyxqh92yfz32hsvc713kxgy89h2sj-system.drv
   /gnu/store/l7a4v3izzcwa681sg7pcq4bhllg4l3j4-slim.cfg.drv
   /gnu/store/3ibsmapzd65rj30a0mxkd74qv36rprmc-dmd.conf.drv
   /gnu/store/1nawmbn0qnafr5inq14xil9cw1x16sns-boot.drv
ERROR: In procedure primitive-load:
ERROR: In procedure scm_lreadr:
/gnu/store/1d4h26j8w7vbmybv09b9839drf1i96x4-slim.cfg-builder:1:159: Unknown
# object: #\<
builder for `/gnu/store/l7a4v3izzcwa681sg7pcq4bhllg4l3j4-slim.cfg.drv'
failed with exit code 1
cannot build derivation
`/gnu/store/3ibsmapzd65rj30a0mxkd74qv36rprmc-dmd.conf.drv': 1 dependencies
couldn't be built
cannot build derivation
`/gnu/store/1nawmbn0qnafr5inq14xil9cw1x16sns-boot.drv': 1 dependencies
couldn't be built
cannot build derivation
`/gnu/store/w95zdcd070xgpgbldfmij9b7m0v3px9g-system.drv': 1 dependencies
couldn't be built
guix system: error: build failed: build of
`/gnu/store/w95zdcd070xgpgbldfmij9b7m0v3px9g-system.drv' failed

Maybe I need to add some (use modules ...) statements? Where should I put
(mlet ...) statement?

Dmitry