diff --git a/phase2/master.cfg b/phase2/master.cfg
index 3996218..a934f1f 100644
--- a/phase2/master.cfg
+++ b/phase2/master.cfg
@@ -736,7 +736,7 @@ for arch in arches:
             command="cd bin/packages/%s; " % (arch[0])
             + "find . -type f -not -name 'sha256sums' -printf \"%P\n\" | "
             + "sort | xargs -r ../../../staging_dir/host/bin/mkhash -n sha256 | "
-            + "sed -ne 's!^\(.*\) \(.*\)$!\1 *\2!p' > sha256sums",
+            + r"sed -ne 's!^\(.*\) \(.*\)$!\1 *\2!p' > sha256sums",
             haltOnFailure=True,
         )
     )