Include patch in srpm on fedora too but only apply it on EL9

12to11.spec

@@ -25,10 +25,11 @@ URL:            https://github.com/fish4terrisa-MSDSM/12to11
 Source0:        %{url}/archive/refs/tags/v%{version}/%{name}-%{version}.tar.gz
 
 # EL9 ships wayland 1.21, which lacks WL_SUBCOMPOSITOR_ERROR_BAD_PARENT
-# (added in wayland 1.22).  Only needed on EL9.
-%if 0%{?rhel} == 9
+# (added in wayland 1.22).  Patch0 must be declared unconditionally:
+# COPR's SRPM import parses this spec on Fedora (where %%{?rhel} is
+# undefined), so a conditional Patch tag would never be collected.
+# The patch is only applied on EL9 (see %%prep).
 Patch0:         12to11-1.0.0-wayland-1.21-compat.patch
-%endif
 
 # Build dependencies
 BuildRequires:  make
@@ -80,7 +81,10 @@ fish4terrisa-MSDSM; the original SourceForge project has been
 unmaintained since 2022.
 
 %prep
-%autosetup -p1
+%autosetup -N
+%if 0%{?rhel} == 9
+%patch0 -p1
+%endif
 
 %build
 # Export the RPM build flags: the Makefile uses CFLAGS ?= / LDFLAGS +=