diff --git a/ci/ciimage/ubuntu-rolling/install.sh b/ci/ciimage/ubuntu-rolling/install.sh
index 35a0b0ea2..e1747034f 100755
--- a/ci/ciimage/ubuntu-rolling/install.sh
+++ b/ci/ciimage/ubuntu-rolling/install.sh
@@ -29,7 +29,7 @@ pkgs=(
   openjdk-11-jre
 )
 
-sed -i '/^#\sdeb-src /s/^#//' "/etc/apt/sources.list"
+sed -i '/^Types: deb/s/deb/deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
 apt-get -y update
 apt-get -y upgrade
 apt-get -y install eatmydata