diff --git a/hyena-0.5-fix-build-makefiles.patch b/hyena-0.5-fix-build-makefiles.patch
new file mode 100644
index 0000000..fc9b7aa
--- /dev/null
+++ b/hyena-0.5-fix-build-makefiles.patch
@@ -0,0 +1,22 @@
+From e971e91fe82b90ba2931ba3be8cf704dd0e016fe Mon Sep 17 00:00:00 2001
+From: Gabriel Burt <gabriel.burt@gmail.com>
+Date: Thu, 28 Oct 2010 15:11:13 +0000
+Subject: [build] Remove 'dnl' line form build.rules.mk (bgo#633333)
+
+---
+(limited to 'build/build.rules.mk')
+
+diff --git a/build/build.rules.mk b/build/build.rules.mk
+index 648a60d..31291ba 100644
+--- a/build/build.rules.mk
++++ b/build/build.rules.mk
+@@ -2,7 +2,6 @@ UNIQUE_FILTER_PIPE = tr [:space:] \\n | sort | uniq
+ BUILD_DATA_DIR = $(top_builddir)/bin/share/$(PACKAGE)
+ 
+ SOURCES_BUILD = $(addprefix $(srcdir)/, $(SOURCES))
+-dnl SOURCES_BUILD += $(top_srcdir)/src/AssemblyInfo.cs
+ 
+ RESOURCES_EXPANDED = $(addprefix $(srcdir)/, $(RESOURCES))
+ RESOURCES_BUILD = $(foreach resource, $(RESOURCES_EXPANDED), \
+--
+cgit v0.9.0.2
diff --git a/hyena.spec b/hyena.spec
index 049ff95..7b237ac 100644
--- a/hyena.spec
+++ b/hyena.spec
@@ -1,21 +1,20 @@
 Name:          hyena
 Version:       0.5
-Release:       3mamba
+Release:       4mamba
 Summary:       A C# library used to make awesome applications
 Group:         Development/Languages
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
-URL:           http://live.gnome.org/Hyena
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://wiki.gnome.org/Hyena
 Source:        http://ftp.gnome.org/pub/GNOME/sources/hyena/%{version}/hyena-%{version}.tar.bz2
+Patch0:        hyena-0.5-fix-build-makefiles.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: gtk-sharp2-devel
 BuildRequires: mono-devel
 ## AUTOBUILDREQ-END
-BuildRequires: make381
 Requires:      gtk-sharp
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Hyena contains a lot of random things, including useful data structures, a Sqlite-based db layer, cool widgets, a JSON library, a smart job/task scheduler, a user-query/search parser, and much more.
@@ -30,19 +29,23 @@ Requires:      gtk-sharp-devel
 %description devel
 Hyena contains a lot of random things, including useful data structures, a Sqlite-based db layer, cool widgets, a JSON library, a smart job/task scheduler, a user-query/search parser, and much more.
 It's particularly useful for Gtk# applications, though only the Hyena.Gui assembly requires Gtk#.
-
-This package contains static libraries and header files need for development.
+This package contains static libraries and header files needed for development.
 
 #% debug_package
 
 %prep
 %setup -q
+%patch0 -p1 -b .fix-build-makefiles
 # FIX for mono 6
-sed -i "s|mono/2.0|mono/2.0-api|" configure
+sed -i "s/gmcs/mcs/;s|2\.0|2.0-api|" build/m4/shamrock/mono.m4
+
+aclocal -I build/m4/shamrock
+automake --gnu
+autoconf
 
 %build
 %configure
-make381
+%make
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -61,6 +64,9 @@ make381 install DESTDIR=%{buildroot}
 %{_libdir}/pkgconfig/*.pc
 
 %changelog
+* Fri Sep 30 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5-4mamba
+- rebuild without make381
+
 * Sun Sep 27 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5-3mamba
 - rebuilt with mono 6.10.0.104