diff --git a/petsc.spec b/petsc.spec
index 4497136..a58f4c7 100644
--- a/petsc.spec
+++ b/petsc.spec
@@ -492,11 +492,7 @@ BuildRequires:  hdf5-mpich-devel
 BuildRequires:  scalapack-mpich-devel
 BuildRequires:  ptscotch-mpich-devel
 BuildRequires:  python3-numpy
-%if 0%{?rhel} || 0%{?fedora} < 39
 BuildRequires:  python3-Cython
-%else
-BuildRequires:  python3-pip
-%endif
 Requires:       petsc-mpich%{?_isa}
 Requires:       hdf5-mpich%{?_isa}
 Requires:       scalapack-openmpi%{?_isa}
@@ -580,7 +576,8 @@ cp -a petsc4py-%{version}/* %{name}-%{version}/
 rm -rf %{name}-%{version}/*.egg-info
 rm -rf petsc4py-%{version}
 
-%if 0%{?fedora} > 37
+# Use pre-generated Cython files
+%if 0%{?fedora} > 38
 rm -f %{name}-%{version}/src/binding/petsc4py/src/PETSc.c
 install -pm 644 %{SOURCE2} %{name}-%{version}/src/binding/petsc4py/src/PETSc.c
 rm -f %{name}-%{version}/src/binding/petsc4py/src/PETSc.h
@@ -589,6 +586,9 @@ rm -f %{name}-%{version}/src/binding/petsc4py/src/PETSc_api.h
 install -pm 644 %{SOURCE4} %{name}-%{version}/src/binding/petsc4py/src/PETSc_api.h
 %endif
 
+# Remove pre-generated Cython files
+#rm $(grep -rl '/\* Generated by Cython')
+
 %if 0%{?fedora}
 for i in `find . -name 'setup.py' -o -name 'configure' -o -name '*.py'`; do
 %py3_shebang_fix $i
@@ -605,11 +605,6 @@ pushd %{name}-%{version}
 %endif
 popd
 
-# Remove pregenerated Cython C sources
-pushd %{name}-%{version}
-rm $(grep -rl '/\* Generated by Cython')
-popd
-
 %if %{with arch64}
 cp -a %{name}-%{version} build64
 pushd build64