--- a/debian/rules	2019-08-04 09:15:35.043423422 +0100
--- b/debian/rules	2019-08-04 09:56:17.260567876 +0100
@@ -56,7 +56,8 @@
 override_dh_install:
 	dh_install
 	for testfile in $$( find debian/libsuperlu-dist-dev -name CTestTestfile.cmake ); do \
-	    sed -r "s|$(CURDIR)|<<builddir>>/superlu-dist|; \
-		    s|(.*)\".*/(EXAMPLE/.*ua)|\1\"/usr/lib/$(DEB_HOST_MULTIARCH)/superlu-dist/tests/\2|" \
+	    sed -e "s|$(CURDIR)|<<builddir>>/superlu-dist|;" \
+	    	-i $$testfile; \
+	    sed -r "s|(.*)\".*/(EXAMPLE/.*ua)|\1\"/usr/lib/$(DEB_HOST_MULTIARCH)/superlu-dist/tests/\2|" \
 		-i $$testfile; \
 	done