use docker

.travis.yml

@@ -1,14 +1,18 @@
-language: perl
-perl:
-  - '5.8'
-  - '5.10'
-  - '5.16'
-  - '5.30'
-addons:
-  apt:
-    packages:
-    - libdb-dev
-install:
-  - curl -fsSL --compressed https://git.io/cpm | perl - install -g --with-develop --with-recommends
+language: minimal
+services: docker
+env:
+  - image=perl:5.8
+  - image=perl:5.10
+  - image=perl:5.16
+  - image=perl:5.30
+before_install:
+  - docker pull $image
+  - docker run $image perl -V
 script:
-  - prove -lr --timer t xt
+  - |
+    docker run --init -it -v $PWD:/$TRAVIS_REPO_SLUG -w /$TRAVIS_REPO_SLUG $image bash -c '
+    set -euxo pipefail
+    apt-get -qq update && apt-get -qq install -y unzip libdb-dev
+    curl -fsSL --compressed https://git.io/cpm | perl - install -g --with-develop --with-recommends
+    prove -lr --timer t xt
+    '