diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d43c1cb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/frozen-1.1.1.tar.gz
diff --git a/079f73cc5c6413127d47f325cbb34a607e2cb030.patch b/079f73cc5c6413127d47f325cbb34a607e2cb030.patch
new file mode 100644
index 0000000..1ce542e
--- /dev/null
+++ b/079f73cc5c6413127d47f325cbb34a607e2cb030.patch
@@ -0,0 +1,37 @@
+From 079f73cc5c6413127d47f325cbb34a607e2cb030 Mon Sep 17 00:00:00 2001
+From: serge-sans-paille <serge.guelton@telecom-bretagne.eu>
+Date: Fri, 16 Dec 2022 22:58:51 +0100
+Subject: [PATCH] Workaround gcc 11 limitation
+
+For some reason, gcc sees a constexpr violation here. Trust clang and msvc on this.
+---
+ include/frozen/unordered_set.h | 2 +-
+ tests/test_unordered_set.cpp   | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/frozen/unordered_set.h b/include/frozen/unordered_set.h
+index 4d16df9..196ea50 100644
+--- a/include/frozen/unordered_set.h
++++ b/include/frozen/unordered_set.h
+@@ -105,7 +105,7 @@ class unordered_set {
+   /* lookup */
+   template <class KeyType, class Hasher, class Equal>
+   constexpr std::size_t count(KeyType const &key, Hasher const &hash, Equal const &equal) const {
+-    auto const k = lookup(key, hash);
++    auto const & k = lookup(key, hash);
+     return equal(k, key);
+   }
+   template <class KeyType>
+diff --git a/tests/test_unordered_set.cpp b/tests/test_unordered_set.cpp
+index e90a0d4..042c1a8 100644
+--- a/tests/test_unordered_set.cpp
++++ b/tests/test_unordered_set.cpp
+@@ -65,7 +65,7 @@ TEST_CASE("tripleton str frozen unordered set", "[unordered set]") {
+   constexpr auto max_size = ze_set.max_size();
+   REQUIRE(max_size == 3);
+ 
+-  constexpr auto nocount = ze_set.count(4);
++  const auto nocount = ze_set.count(4);
+   REQUIRE(nocount == 0);
+ 
+   constexpr auto count = ze_set.count(1);
diff --git a/frozen.spec b/frozen.spec
new file mode 100644
index 0000000..5cd5fdc
--- /dev/null
+++ b/frozen.spec
@@ -0,0 +1,65 @@
+# Header-only package
+%global debug_package %{nil}
+
+Name:           frozen
+Version:        1.1.1
+Release:        3%{?dist}
+Summary:        A header-only, constexpr alternative to gperf for C++14 users 
+
+License:        Apache-2.0
+URL:            https://github.com/serge-sans-paille/frozen
+Source0:        %{url}/archive/%{version}/%{name}-%{version}.tar.gz
+# Fixes FTBFS, already present in upstream main branch.
+Patch0:         includes.patch
+Patch1:         079f73cc5c6413127d47f325cbb34a607e2cb030.patch
+
+BuildRequires: gcc-c++
+BuildRequires: cmake
+
+%description
+Header-only library that provides 0 cost initialization
+for immutable containers, fixed-size containers, and
+various algorithms.
+
+%package devel
+Summary:        Development files for %{name}
+BuildArch:      noarch
+Requires:       pkgconfig
+Provides:       %{name}-static = %{version}-%{release}
+
+%description devel
+Development files for %{name}.
+
+
+%prep
+%setup -q
+
+%patch -P 0 -p0
+%patch -P 1 -p1
+
+%build
+%cmake -DCMAKE_BUILD_TYPE=Release
+%cmake_build
+
+%check
+%ctest
+
+%install
+%cmake_install
+
+
+%files devel
+%license LICENSE
+%doc examples/ AUTHORS README.rst
+%{_includedir}/frozen/
+%{_datadir}/cmake/%{name}/
+
+%changelog
+* Wed Jul 19 2023 Gwyn Ciesla <gwync@protonmail.com> - 1.1.1-3
+- Drop main package.
+
+* Tue Jul 18 2023 Gwyn Ciesla <gwync@protonmail.com> - 1.1.1-2
+- review fixes.
+
+* Mon Jul 17 2023 Gwyn Ciesla <gwync@protonmail.com> - 1.1.1-1
+- Initial package.
diff --git a/includes.patch b/includes.patch
new file mode 100644
index 0000000..039138b
--- /dev/null
+++ b/includes.patch
@@ -0,0 +1,11 @@
+--- include/frozen/bits/pmh.h~	2022-03-31 00:56:25.000000000 -0500
++++ include/frozen/bits/pmh.h	2023-07-17 13:42:52.903675376 -0500
+@@ -30,6 +30,8 @@
+ #include <array>
+ #include <limits>
+ 
++#include <cstdint>
++
+ namespace frozen {
+ 
+ namespace bits {
diff --git a/sources b/sources
new file mode 100644
index 0000000..3408145
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (frozen-1.1.1.tar.gz) = e22561a4e634e388e11f95b3005bc711e543013d314f6aaeda34befb2c673aea2d71a717d8822bc8fa85bdc8409945ba2ad91a1bac4f8cb5303080de01a5f60e