diff --git a/tools/ci/install-singularity.sh b/tools/ci/install-singularity.sh
index f031295c..430a9ce4 100755
--- a/tools/ci/install-singularity.sh
+++ b/tools/ci/install-singularity.sh
@@ -4,5 +4,7 @@ release="$(curl -fsSL https://api.github.com/repos/sylabs/singularity/releases/l
 codename="$(lsb_release -cs)"
 arch="$(dpkg --print-architecture)"
 wget -O /tmp/singularity-ce.deb https://github.com/sylabs/singularity/releases/download/$release/singularity-ce_${release#v}-${codename}_$arch.deb
+set -x
+sudo apt-get install uidmap
 sudo dpkg -i /tmp/singularity-ce.deb
 sudo apt-get install -f