diff --git a/ci/ciimage/gentoo/install.sh b/ci/ciimage/gentoo/install.sh
index 1c94b0cc0fa1..a98d15d460ea 100755
--- a/ci/ciimage/gentoo/install.sh
+++ b/ci/ciimage/gentoo/install.sh
@@ -133,8 +133,15 @@ EOF
 
 # Enable all Pythons
 echo '*/* PYTHON_TARGETS: python3_10 python3_11 python3_12' >> /etc/portage/package.use/python
-echo '-python_targets_python3_12 -python_single_target_python3_12' >> /etc/portage/profile/use.mask
-echo '-python_targets_python3_12 -python_single_target_python3_12' >> /etc/portage/profile/use.stable.mask
+cat <<-EOF >> /etc/portage/profile/use.mask
+-python_targets_python3_12
+-python_single_target_python3_12
+EOF
+cat <<-EOF >> /etc/portage/profile/use.stable.mask
+-python_targets_python3_12
+-python_single_target_python3_12
+EOF
+
 echo 'dev-lang/python ensurepip' >> /etc/portage/package.use/python
 
 # Silly mono circular dep