diff --git a/.travis.yml b/.travis.yml
index 1bb3931c..66812ad0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,8 +31,7 @@ before_install:
  - test -z "$STACK" || { travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack' ; }
  # stack needs cabal :-(
  - test -z "$STACK" || sudo add-apt-repository -y ppa:hvr/ghc
- - test -z "$STACK" || travis_retry sudo apt-get update
- - test -z "$STACK" || travis_retry sudo apt-get install cabal-install-1.24
+ - test -z "$STACK" || travis_retry sudo bash -c "apt-get update; apt-get install cabal-install-1.24"
  - test -z "$STACK" || export PATH=/opt/cabal/1.24/bin:$PATH
 
  - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH