Pin groff version in CI

To make it more predictable and easier to find out about discrepancies
in the output.

1 files changed, 1 insertions, 1 deletions

diff --git a/Rakefile b/Rakefile
index c9cba953e9..719f6e040a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -46,7 +46,7 @@ namespace :spec do
       # Refresh packages index that the ones we need can be installed
       sh "sudo apt-get update"
       # Install groff so ronn can generate man/help pages
-      sh "sudo apt-get install groff-base -y"
+      sh "sudo apt-get install groff-base=1.22.3-10 -y"
       # Install graphviz so that the viz specs can run
       sh "sudo apt-get install graphviz -y"