Unable to make Rserve image

[samwalrus]

When trying to make this image I get an error:

`it017509:rserve-sandbox sn0550$ make image
docker build -t rserve . 2>&1 | tee mkimg.log
Sending build context to Docker daemon 199.2kB
Step 1/18 : FROM r-base
---> 3f037ef6767c
Step 2/18 : RUN apt-get update && apt-get install -y libcurl4-openssl-dev libssl-dev libcairo-dev
---> Running in cf71084de3d7
Get:1 http://cdn-fastly.deb.debian.org/debian sid InRelease [139 kB]
Get:2 http://cdn-fastly.deb.debian.org/debian testing InRelease [109 kB]
Get:3 http://cdn-fastly.deb.debian.org/debian sid/main amd64 Packages [8,273 kB]
Get:4 http://cdn-fastly.deb.debian.org/debian testing/main amd64 Packages [7,696 kB]
Fetched 16.2 MB in 5s (3,087 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
libcairo2-dev : Depends: libfontconfig1-dev (>= 2.2.95) but it is not going to be installed
Depends: libfreetype6-dev (>= 2.1.10) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
The command '/bin/sh -c apt-get update && apt-get install -y libcurl4-openssl-dev libssl-dev libcairo-dev' returned a non-zero code: 100`