diff --git a/.gitignore b/.gitignore
index ba46069..c922267 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,7 +29,3 @@
 /xtl-0.7.3.tar.gz
 /xtl-0.7.4.tar.gz
 /xtl-0.7.5.tar.gz
-/xtl-0.7.6.tar.gz
-/xtl-0.7.7.tar.gz
-/xtl-0.8.0.tar.gz
-/xtl-0.8.1.tar.gz
diff --git a/.packit.yaml b/.packit.yaml
deleted file mode 100644
index d11d5ba..0000000
--- a/.packit.yaml
+++ /dev/null
@@ -1,18 +0,0 @@
-# See the documentation for more information:
-# https://packit.dev/docs/configuration/
----
-jobs:
-  - job: pull_from_upstream
-    trigger: release
-    dist_git_branches:
-      rawhide:
-        fast_forward_merge_into:
-          - fedora-branched
-  - job: koji_build
-    trigger: commit
-    dist_git_branches:
-      - fedora-all
-  - job: bodhi_update
-    trigger: commit
-    dist_git_branches:
-      - fedora-all
diff --git a/0001-Fix-build-with-sphinx-4.patch b/0001-Fix-build-with-sphinx-4.patch
new file mode 100644
index 0000000..34697ca
--- /dev/null
+++ b/0001-Fix-build-with-sphinx-4.patch
@@ -0,0 +1,35 @@
+From 1fd2aef4fcaabddcb533ffe2f999e55d1e3ce7fe Mon Sep 17 00:00:00 2001
+From: Elliott Sales de Andrade <quantum.analyst@gmail.com>
+Date: Sun, 11 Jul 2021 17:54:54 -0400
+Subject: [PATCH] Fix build with Sphinx 4.
+
+`add_stylesheet` was deprecated in 1.8 and removed in 4.0 [1]. The
+replacement, `add_css_file` was added in 1.0, which is older than any
+version required by `breathe`.
+
+[1] https://www.sphinx-doc.org/en/master/extdev/deprecated.html?highlight=add_stylesheet
+---
+ docs/source/conf.py | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/docs/source/conf.py b/docs/source/conf.py
+index 333b75c..242e3fd 100644
+--- a/docs/source/conf.py
++++ b/docs/source/conf.py
+@@ -15,8 +15,10 @@
+ 
+ html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+ 
++
+ def setup(app):
+-    app.add_stylesheet("main_stylesheet.css")
++    app.add_css_file("main_stylesheet.css")
++
+ 
+ extensions = ['breathe']
+ breathe_projects = { 'xtl': '../xml' }
+@@ -35,4 +37,3 @@ def setup(app):
+ pygments_style = 'sphinx'
+ todo_include_todos = False
+ htmlhelp_basename = 'xtldoc'
+-
diff --git a/README.packit b/README.packit
deleted file mode 100644
index fb341a1..0000000
--- a/README.packit
+++ /dev/null
@@ -1,3 +0,0 @@
-This repository is maintained by packit.
-https://packit.dev/
-The file was generated using packit 1.11.0.post1.dev7+gfdcdf3a32.
diff --git a/sources b/sources
index 824c53c..ef690d8 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (xtl-0.8.1.tar.gz) = cb032d27b2f7dff135c442fd92e3924eb108355769354c9eee9ec2d3ec7ebd867ee89ee2e10f41352447e08f185637f338fdc40e37d60d85cf2fffdcaac1ce6c
+SHA512 (xtl-0.7.5.tar.gz) = fb447334f68f255d7d28c9202eee2cec70d007c1031f3756a6acd0cc019c0d95ed1d12ec63f2e9fb3df184f9ec305e6a3c808bb88c1e3eb922916ad059d2e856
diff --git a/xtl.spec b/xtl.spec
index d7e9e37..c158daa 100644
--- a/xtl.spec
+++ b/xtl.spec
@@ -2,13 +2,15 @@
 %global debug_package %{nil}
 
 Name:           xtl
-Version:        0.8.1
+Version:        0.7.5
 Release:        %autorelease
 License:        BSD-3-Clause
 Summary:        QuantStack tools library
 Url:            https://github.com/QuantStack/xtl
 Source0:        https://github.com/QuantStack/%{name}/archive/%{version}/%{name}-%{version}.tar.gz
 
+Patch0:         0001-Fix-build-with-sphinx-4.patch
+
 BuildRequires:  binutils
 BuildRequires:  cmake
 BuildRequires:  doctest-devel
@@ -41,7 +43,11 @@ Documentation files for %{name} library.
 
 
 %prep
-%autosetup -p1
+%autosetup -p1 -N
+
+%if 0%{?rhel} && 0%{?rhel} < 9
+%patch -P0 -p1 -R
+%endif
 
 
 %build
@@ -53,11 +59,14 @@ make html SPHINXBUILD=sphinx-build-3
 rm build/html/.buildinfo
 popd
 
+
 %install
 %cmake_install
 
+
 %check
-%cmake_build --target xtest
+make -C "%{__cmake_builddir}" xtest
+
 
 %files devel
 %doc README.md
@@ -69,5 +78,6 @@ popd
 %files doc
 %doc docs/build/html
 
+
 %changelog
 %autochangelog