diff --git a/readme.md b/readme.md
index 96dd8ef..6a0a809 100644
--- a/readme.md
+++ b/readme.md
@@ -103,5 +103,4 @@ from various contexts of CA, CI and OCI / OS.
 
 ### .sh
 
-* check if file & variable match
 * support opensuse
diff --git a/spcd.sh b/spcd.sh
index 583a114..32be9e9 100644
--- a/spcd.sh
+++ b/spcd.sh
@@ -42,6 +42,8 @@ spcd_main() {
 
 spcd_set_environment_variables() {
 	spcd_step "Set environment variables"
+	# check script first
+	[ -n "${SPCD}" ] || spcd_error_ci "SPCD"
 	# continuous integration / github → gitea → forgejo
 	if [ -n "${GITHUB_ACTIONS}" ]; then
 		# project branch
@@ -594,6 +596,9 @@ spcd_install_python() {
 
 # TODO move to Python
 spcd_install_packages() {
+	# dos2unix
+	spcd_step "Install dos2unix"
+	spcd_install_package "dos2unix"
 	# epel
 	spcd_step "Install EPEL"
 	case "${SPCD_OS_ID}" in
@@ -705,14 +710,6 @@ ${spcd_ipm__url}
 			"${spcd_ipm__url}" \
 			"${spcd_ipm__root}/${spcd_ipm__name}" ||
 			exit
-		spcd_ipm__script="${spcd_ipm__root}/${spcd_ipm__name}/spcd.sh"
-		if [ -f "${spcd_ipm__script}" ]; then
-			spcd_ipm__file="${spcd_ipm__root}/spcd.sh"
-			printf "%s" "${SPCD}" | tr -d "\r" >"${spcd_ipm__file}"
-			ls -l "${spcd_ipm__file}"
-			sha256sum "${spcd_ipm__file}"
-			sha256sum "${spcd_ipm__script}"
-		fi
 		spcd_ipm__path="${spcd_ipm__root}/${spcd_ipm__name}/${spcd_ipm__name}"
 		echo "\
 ${spcd_ipm__path}
@@ -720,6 +717,18 @@ ${spcd_ipm__path}
 ${SPCD_PYTHON_PACKAGES}"
 		cp --recursive "${spcd_ipm__path}" "${SPCD_PYTHON_PACKAGES}" ||
 			exit
+		# check matching of file and variable
+		spcd_ipm__script="${spcd_ipm__root}/${spcd_ipm__name}/spcd.sh"
+		if [ -f "${spcd_ipm__script}" ]; then
+			spcd_split
+			spcd_ipm__check="${spcd_ipm__root}/check.sha512sum"
+			sha512sum "${spcd_ipm__script}" > "${spcd_ipm__check}"
+			printf "%s" "${SPCD}" >"${spcd_ipm__script}"
+			ls -l "${spcd_ipm__script}"
+			dos2unix "${spcd_ipm__script}"
+			ls -l "${spcd_ipm__script}"
+			sha512sum -c "${spcd_ipm__check}" || spcd_error_ci "SPCD"
+		fi
 	done
 	spcd_split
 	spcd_ls "${SPCD_PYTHON_PACKAGES}"