Add constraint on retry

hpc-coveralls won't build with retry0.7

diff --git a/.travis.yml b/.travis.yml
index 2f82c71d43a2420ecd55c1099ad619707bb535a8..2bc4bbe453c990c44a5088c0007fc44114eaad07 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -77,7 +77,7 @@ install:
 # any command which exits with a non-zero exit code causes the build to fail.
 script:
  - if [ -f configure.ac ]; then autoreconf -i; fi
- - cabal install hpc-coveralls
+ - cabal install hpc-coveralls --constraint=retry==0.6
  - cabal configure --enable-tests --enable-benchmarks -v2 --enable-coverage  # -v2 provides useful information for debugging
  - cabal build   # this builds all libraries and executables (including tests/benchmarks)
  - run-cabal-test test