diff --git a/README.md b/README.md
index 31275d6..206fc48 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # ghc-witherable
 
+GHC witherable: filterable traversable.
+
diff --git a/ghc-witherable-0.4.2-ghc-9.4.8.patch b/ghc-witherable-0.4.2-ghc-9.4.8.patch
new file mode 100644
index 0000000..47dc9a3
--- /dev/null
+++ b/ghc-witherable-0.4.2-ghc-9.4.8.patch
@@ -0,0 +1,18 @@
+--- witherable-0.4.2/witherable.cabal.orig	2023-12-02 17:36:44.265610695 +0100
++++ witherable-0.4.2/witherable.cabal	2023-12-02 17:37:18.332779814 +0100
+@@ -24,12 +24,12 @@
+     Witherable
+     Data.Witherable
+   build-depends:       base                          >=4.9      && <5,
+-                       base-orphans                  >=0.8.4    && <0.9,
++                       base-orphans                  >=0.8.4    && <0.10,
+                        containers                    >=0.5.7.1  && <0.7,
+-                       hashable                      >=1.2.7.0  && <1.4,
++                       hashable                      >=1.2.7.0  && <1.5,
+                        transformers                  >=0.5.2.0  && <0.6,
+                        unordered-containers          >=0.2.12.0 && <0.3,
+-                       vector                        >=0.12.2.0 && <0.13,
++                       vector                        >=0.12.2.0 && <0.14,
+                        indexed-traversable           >=0.1.1    && <0.2,
+                        indexed-traversable-instances >=0.1      && <0.2
+   hs-source-dirs:      src
diff --git a/ghc-witherable.spec b/ghc-witherable.spec
new file mode 100644
index 0000000..3bec074
--- /dev/null
+++ b/ghc-witherable.spec
@@ -0,0 +1,91 @@
+%define ghc_ver %(ghc --numeric-version)
+%define pkg_name %(echo %name | sed "s|^ghc-||")
+
+Name:          ghc-witherable
+Version:       0.4.2
+Release:       1mamba
+Summary:       GHC witherable: filterable traversable
+Group:         Development/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://hackage.haskell.org/package/%{pkg_name}
+Source:        https://hackage.haskell.org/package/witherable-%{version}/witherable-%{version}.tar.gz
+Patch0:        ghc-witherable-0.4.2-ghc-9.4.8.patch
+License:       BSD
+## AUTOBUILDREQ-BEGIN
+BuildRequires: ghc-OneTuple-devel
+BuildRequires: ghc-base-orphans-devel
+BuildRequires: ghc-foldable1-classes-compat-devel
+BuildRequires: ghc-hashable-devel
+BuildRequires: ghc-indexed-traversable-devel
+BuildRequires: ghc-indexed-traversable-instances-devel
+BuildRequires: ghc-libs
+BuildRequires: ghc-primitive-devel
+BuildRequires: ghc-tagged-devel
+BuildRequires: ghc-unordered-containers-devel
+BuildRequires: ghc-vector-devel
+BuildRequires: ghc-vector-stream-devel
+BuildRequires: glibc-devel
+BuildRequires: libgmp-devel
+## AUTOBUILDREQ-END
+BuildRequires: ghc
+BuildRequires: ghc-rpm-macros
+Requires:      ghc = %{ghc_ver}
+
+%description
+%{summary}.
+
+%package devel
+Summary:        Haskell %{pkg_name} library development files
+Provides:       %{name}-static = %{version}-%{release}
+Provides:       %{name}-static%{?_isa} = %{version}-%{release}
+%if %{defined ghc_version}
+Requires:       ghc = %{ghc_version}
+%endif
+Requires:       %{name}%{?_isa} = %{version}-%{release}
+
+%description devel
+This package provides the Haskell %{pkg_name} library development files.
+
+%if %{with haddock}
+%package doc
+Summary:        Haskell %{pkg_name} library documentation
+Requires:       ghc-filesystem
+
+%description doc
+This package provides the Haskell %{pkg_name} library documentation.
+%endif
+
+%prep
+%setup -q -n witherable-%{version}
+%patch 0 -p1
+
+%build
+%ghc_lib_build
+
+%install
+%ghc_lib_install
+
+rm -f %{buildroot}%{_ghclicensedir}/%{name}/LICENSE
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files -f %{name}.files
+%defattr(-,root,root)
+%license LICENSE
+
+%files devel -f %{name}-devel.files
+%defattr(-,root,root)
+#%doc CHANGELOG.markdown README.markdown
+
+%if %{with haddock}
+%files doc -f %{name}-doc.files
+%defattr(-,root,root)
+%license LICENSE
+%endif
+
+%changelog
+* Sat Dec 02 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 0.4.2-1mamba
+- package created using the webbuild interface