I am uploading a NMU to DELAYED/10 in order to fix this.
The debdiff is attached.
diff -Nru gramophone2-0.8.13a/debian/changelog
gramophone2-0.8.13a/debian/changelog
--- gramophone2-0.8.13a/debian/changelog 2024-08-08 18:41:00.000000000
+0200
+++ gramophone2-0.8.13a/debian/changelog 2024-12-14 11:40:01.000000000
+0100
@@ -1,3 +1,10 @@
+gramophone2 (0.8.13a-3.5) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Remove cdbs quilt. (Closes: #1072889)
+
+ -- Bastian Germann <[email protected]> Sat, 14 Dec 2024 11:40:01 +0100
+
gramophone2 (0.8.13a-3.4) unstable; urgency=low
* Non-maintainer upload.
diff -Nru gramophone2-0.8.13a/debian/rules gramophone2-0.8.13a/debian/rules
--- gramophone2-0.8.13a/debian/rules 2022-12-12 22:48:11.000000000 +0100
+++ gramophone2-0.8.13a/debian/rules 2024-12-14 11:40:01.000000000 +0100
@@ -3,7 +3,6 @@
export DEB_CFLAGS_MAINT_APPEND = -fcommon
include /usr/share/cdbs/1/rules/debhelper.mk
include /usr/share/cdbs/1/class/makefile.mk
-include /usr/share/cdbs/1/rules/patchsys-quilt.mk
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/buildflags.mk
