diff --git a/.gitignore b/.gitignore
index 8e0579c..4603ea4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@
 /mkosi-10.tar.gz
 /mkosi-11.tar.gz
 /mkosi-12.tar.gz
+/mkosi-13.tar.gz
diff --git a/0001-py3.11-fix-Enum-formatting-to-work-with-python3.11-a.patch b/0001-py3.11-fix-Enum-formatting-to-work-with-python3.11-a.patch
deleted file mode 100644
index e4ee572..0000000
--- a/0001-py3.11-fix-Enum-formatting-to-work-with-python3.11-a.patch
+++ /dev/null
@@ -1,81 +0,0 @@
-From f73a97aba7f6a586bf96ad970294a332109ab558 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
-Date: Sun, 24 Apr 2022 12:54:57 +0200
-Subject: [PATCH] py3.11: fix Enum formatting to work with python3.11-a7
-
-Something strange is happening with .__repr__() access in python3.11:
-
->>> mkosi.backend.ManifestFormat.mro()
-[<enum 'ManifestFormat'>, <class 'mkosi.backend.Parseable'>, <enum 'Enum'>, <class 'object'>]
->>> mkosi.backend.ManifestFormat.changelog.__repr__()
-Traceback (most recent call last):
-  File "<stdin>", line 1, in <module>
-  File "/usr/lib64/python3.11/enum.py", line 1194, in __repr__
-    return "<%s.%s: %s>" % (self.__class__.__name__, self._name_, v_repr(self._value_))
-                                                                  ^^^^^^^^^^^^^^^^^^^^
-  File "/home/zbyszek/src/mkosi/mkosi/backend.py", line 95, in __repr__
-    return cast(str, getattr(self, "name"))
-                     ^^^^^^^^^^^^^^^^^^^^^
-AttributeError: 'str' object has no attribute 'name'
-
-Enum somehow subverts normal lookup and makes its own __repr__ function be
-used, even though Parseable is listed first in MRO. This seems to be related to
-PEP 663, which was rejected, and the changes reverted for -a4 [1], but then the revert
-was reverted [2].
-
-Let's just sidestep MRO with a method redefinition:
-
->>> mkosi.backend.ManifestFormat.changelog.__repr__
-<bound method ManifestFormat.__repr__ of changelog>
->>> mkosi.backend.ManifestFormat.changelog.__repr__()
-'changelog'
-
-This should work on all python versions. If python3.11 returns to previous
-semantics before the final release, we can remove the workaround.
-
-[1] commit acf7403f9baea3ae1119fc6b4a3298522188bf96
-Author: Ethan Furman <ethan@stoneleaf.us>
-Date:   Sat Jan 15 22:41:43 2022 -0800
-
-    bpo-40066:  [Enum] update str() and format() output (GH-30582)
-
-    Undo rejected PEP-663 changes:
-
-    - restore `repr()` to its 3.10 status
-    - restore `str()` to its 3.10 status
-
-[2] commit 42a64c03ec5c443f2a5c2ee4284622f5d1f5326c
-Author: Victor Stinner <vstinner@python.org>
-Date:   Mon Jan 17 13:58:40 2022 +0100
-
-    Revert "bpo-40066:  [Enum] update str() and format() output (GH-30582)" (GH-30632)
-
-    This reverts commit acf7403f9baea3ae1119fc6b4a3298522188bf96.
----
- mkosi/backend.py | 8 ++++++++
- 1 file changed, 8 insertions(+)
-
-diff --git a/mkosi/backend.py b/mkosi/backend.py
-index 78006f392a..3c57ec6295 100644
---- a/mkosi/backend.py
-+++ b/mkosi/backend.py
-@@ -217,11 +217,19 @@ class OutputFormat(Parseable, enum.Enum):
-     def has_fs_compression(self) -> bool:
-         return self.is_squashfs() or self.is_btrfs()
- 
-+    def __repr__(self) -> str:
-+        return Parseable.__repr__(self)
-+    def __str__(self) -> str:
-+        return Parseable.__str__(self)
- 
- class ManifestFormat(Parseable, enum.Enum):
-     json      = "json"       # the standard manifest in json format
-     changelog = "changelog"  # human-readable text file with package changelogs
- 
-+    def __repr__(self) -> str:
-+        return Parseable.__repr__(self)
-+    def __str__(self) -> str:
-+        return Parseable.__str__(self)
- 
- class PartitionIdentifier(enum.Enum):
-     esp        = 'esp'
diff --git a/mkosi.spec b/mkosi.spec
index d61d842..d7ee891 100644
--- a/mkosi.spec
+++ b/mkosi.spec
@@ -1,5 +1,5 @@
 Name:           mkosi
-Version:        12
+Version:        13
 Release:        %autorelease
 Summary:        Create bespoke OS images
 
@@ -7,12 +7,12 @@ License:        LGPLv2+
 URL:            https://github.com/systemd/mkosi
 Source0:        https://github.com/systemd/mkosi/archive/v%{version}/%{name}-%{version}.tar.gz
 
-Patch:          0001-py3.11-fix-Enum-formatting-to-work-with-python3.11-a.patch
-
 BuildArch:      noarch
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-pytest
+BuildRequires:  binutils
+BuildRequires:  python3dist(pexpect)
 
 %global recoreq %{?el7:Requires}%{!?el7:Recommends}
 
@@ -23,6 +23,7 @@ BuildRequires:  python3-pytest
 %{recoreq}:     e2fsprogs
 %{recoreq}:     squashfs-tools
 %{recoreq}:     veritysetup
+%{recoreq}:     binutils
 %if 0%{?el7} == 0
 Recommends:     debootstrap
 Recommends:     arch-install-scripts
@@ -33,6 +34,7 @@ Recommends:     cpio
 Recommends:     zstd
 Recommends:     python3dist(argcomplete)
 Recommends:     python3dist(cryptography)
+Recommends:     python3dist(pexpect)
 %endif
 
 %description
diff --git a/sources b/sources
index f512a29..f0154de 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mkosi-12.tar.gz) = ae59789e3b4855400d130714fac0b3b599b3e69631bc6a5267916697d0722c05a6c788cd70d224917261c931fe93fa287d3d23f6f00849cb80ff9794a13dc04e
+SHA512 (mkosi-13.tar.gz) = 285964835daf5c971ff7580fd99a09107db057da15ad52be1f2aa0bd9be12909b5d214f24ffde857475f9a896731d201d193fc67423d56b6bb507f72a01f24ad