alright, let's also use ltm from packagecloud

.travis.yml

@@ -6,19 +6,16 @@ language: c
 addons:
   apt:
     sources:
-    - debian-sid
     - llvm-toolchain-trusty-4.0
     packages:
-    - binutils
     - clang-4.0
-    - libtommath-dev
 
 before_script:
   - gem install coveralls-lcov
   - curl http://ftp.de.debian.org/debian/pool/main/l/lcov/lcov_1.11.orig.tar.gz | tar xz
   - export PATH=$PATH:`pwd`/lcov-1.11/bin
-  - curl -s https://packagecloud.io/install/repositories/libtom/tomsfastmath/script.deb.sh | sudo bash
-  - sudo apt-get install libtfm-dev=0.13-5
+  - curl -s https://packagecloud.io/install/repositories/libtom/packages/script.deb.sh | sudo bash
+  - sudo apt-get install libtfm-dev=0.13-5 libtommath-dev=1.0-5
 
 matrix:
   fast_finish: true