diff --git a/nixos/modules/services/continuous-integration/buildkite-agent.nix b/nixos/modules/services/continuous-integration/buildkite-agent.nix
index 49160b43c61..aa717c466ee 100644
--- a/nixos/modules/services/continuous-integration/buildkite-agent.nix
+++ b/nixos/modules/services/continuous-integration/buildkite-agent.nix
@@ -225,8 +225,8 @@ in
         in
           ''
             mkdir -m 0700 -p "${sshDir}"
-            cp -f "${toString cfg.openssh.privateKeyPath}" "${sshDir}/id_rsa"
-            chmod 600 "${sshDir}"/id_rsa*
+            cp -f "${toString cfg.privateSshKeyPath}" "${sshDir}/id_rsa"
+            chmod 600 "${sshDir}"/id_rsa
 
             cat > "${cfg.dataDir}/buildkite-agent.cfg" <<EOF
             token="$(cat ${toString cfg.tokenPath})"