diff --git a/eigen3-3.2.10-fix-pkgconfig-includedir.patch b/eigen3-3.2.10-fix-pkgconfig-includedir.patch
deleted file mode 100644
index b7bc17a..0000000
--- a/eigen3-3.2.10-fix-pkgconfig-includedir.patch
+++ /dev/null
@@ -1,8 +0,0 @@
---- eigen3-3.2.10/eigen/eigen3.pc.in.orig	2016-10-23 23:58:56.714454040 +0200
-+++ eigen3-3.2.10/eigen/eigen3.pc.in	2016-10-23 23:59:02.068510229 +0200
-@@ -6,4 +6,4 @@
- Requires:
- Version: @EIGEN_VERSION_NUMBER@
- Libs:
--Cflags: -I${prefix}/@INCLUDE_INSTALL_DIR@
-+Cflags: -I@INCLUDE_INSTALL_DIR@
diff --git a/eigen3-3.3.5-disable-DGMRES.patch b/eigen3-3.3.5-disable-DGMRES.patch
deleted file mode 100644
index a4be925..0000000
--- a/eigen3-3.3.5-disable-DGMRES.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -Nru eigen3-3.3.5.orig/eigen/unsupported/Eigen/IterativeSolvers eigen3-3.3.5/eigen/unsupported/Eigen/IterativeSolvers
---- eigen3-3.3.5.orig/eigen/unsupported/Eigen/IterativeSolvers	2018-07-23 11:33:42.000000000 +0200
-+++ eigen3-3.3.5/eigen/unsupported/Eigen/IterativeSolvers	2018-08-22 20:35:02.966001027 +0200
-@@ -33,7 +33,7 @@
- #include "../../Eigen/Jacobi"
- #include "../../Eigen/Householder"
- #include "src/IterativeSolvers/GMRES.h"
--#include "src/IterativeSolvers/DGMRES.h"
-+//#include "src/IterativeSolvers/DGMRES.h"
- //#include "src/IterativeSolvers/SSORPreconditioner.h"
- #include "src/IterativeSolvers/MINRES.h"
- 
diff --git a/eigen3-3.4.0-fix-vectorized-reduction-half.patch b/eigen3-3.4.0-fix-vectorized-reduction-half.patch
new file mode 100644
index 0000000..217eef2
--- /dev/null
+++ b/eigen3-3.4.0-fix-vectorized-reduction-half.patch
@@ -0,0 +1,46 @@
+From d0e3791b1a0e2db9edd5f1d1befdb2ac5a40efe0 Mon Sep 17 00:00:00 2001
+From: Alex Druinsky <adruinsky@google.com>
+Date: Wed, 20 Oct 2021 16:03:12 -0700
+Subject: [PATCH] Fix vectorized reductions for Eigen::half
+
+Fixes compiler errors in expressions that look like
+
+  Eigen::Matrix<Eigen::half, 3, 1>::Random().maxCoeff()
+
+The error comes from the code that creates the initial value for
+vectorized reductions. The fix is to specify the scalar type of the
+reduction's initial value.
+
+The cahnge is necessary for Eigen::half because unlike other types,
+Eigen::half scalars cannot be implicitly created from integers.
+---
+ Eigen/src/Core/PartialReduxEvaluator.h | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/Eigen/src/Core/PartialReduxEvaluator.h b/Eigen/src/Core/PartialReduxEvaluator.h
+index 4040ae726f..a179688815 100644
+--- a/Eigen/src/Core/PartialReduxEvaluator.h
++++ b/Eigen/src/Core/PartialReduxEvaluator.h
+@@ -56,12 +56,17 @@ struct packetwise_redux_traits
+ /* Value to be returned when size==0 , by default let's return 0 */
+ template<typename PacketType,typename Func>
+ EIGEN_DEVICE_FUNC
+-PacketType packetwise_redux_empty_value(const Func& ) { return pset1<PacketType>(0); }
++PacketType packetwise_redux_empty_value(const Func& ) {
++  const typename unpacket_traits<PacketType>::type zero(0);
++  return pset1<PacketType>(zero);
++}
+ 
+ /* For products the default is 1 */
+ template<typename PacketType,typename Scalar>
+ EIGEN_DEVICE_FUNC
+-PacketType packetwise_redux_empty_value(const scalar_product_op<Scalar,Scalar>& ) { return pset1<PacketType>(1); }
++PacketType packetwise_redux_empty_value(const scalar_product_op<Scalar,Scalar>& ) {
++  return pset1<PacketType>(Scalar(1));
++}
+ 
+ /* Perform the actual reduction */
+ template<typename Func, typename Evaluator,
+-- 
+GitLab
+
diff --git a/eigen3.spec b/eigen3.spec
index 564f905..6e05cd3 100644
--- a/eigen3.spec
+++ b/eigen3.spec
@@ -1,6 +1,6 @@
 Name:          eigen3
 Version:       3.4.0
-Release:       1mamba
+Release:       2mamba
 Summary:       A C++ template library for linear algebra
 Group:         System/Libraries
 Vendor:        openmamba
@@ -8,8 +8,7 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://eigen.tuxfamily.org/index.php?title=Main_Page
 Source:        https://gitlab.com/libeigen/eigen.git/%{version}/eigen-%{version}.tar.bz2
-Patch0:        eigen3-3.2.10-fix-pkgconfig-includedir.patch
-Patch1:        eigen3-3.3.5-disable-DGMRES.patch
+Patch0:        eigen3-3.4.0-fix-vectorized-reduction-half.patch
 License:       LGPL, MPL
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
@@ -33,18 +32,14 @@ This package contains static libraries and header files needed for development.
 
 %prep
 %setup -q -n eigen-%{version}
-#% patch 0 -p2
-#% patch 1 -p2
+%patch 0 -p1 -b .fix-vectorized-reduction-half
 
 %build
-%cmake -d build
-
-#   -DINCLUDE_INSTALL_DIR=include/eigen3
+%cmake -d build \
+   -DINCLUDE_INSTALL_DIR=%{_includedir}/eigen3
 
 %make
 
-make doc
-
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 %makeinstall -C build
@@ -54,11 +49,13 @@ make doc
 
 %files devel
 %defattr(-,root,root)
-%dir %{_includedir}/Eigen
-%{_includedir}/Eigen/*
-%dir %{_includedir}/unsupported/Eigen
-%{_includedir}/unsupported/Eigen/*
-%{_includedir}/signature_of_eigen3_matrix_library
+%dir %{_includedir}/eigen3
+%dir %{_includedir}/eigen3/Eigen
+%{_includedir}/eigen3/Eigen/*
+%dir %{_includedir}/eigen3/unsupported
+%dir %{_includedir}/eigen3/unsupported/Eigen
+%{_includedir}/eigen3/unsupported/Eigen/*
+%{_includedir}/eigen3/signature_of_eigen3_matrix_library
 %dir %{_datadir}/eigen3
 %dir %{_datadir}/eigen3/cmake
 %{_datadir}/eigen3/cmake/*.cmake
@@ -66,6 +63,9 @@ make doc
 %doc COPYING.*
 
 %changelog
+* Thu Oct 31 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 3.4.0-2mamba
+- install headers in default path /usr/include/eigen3
+
 * Mon Feb 26 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 3.4.0-1mamba
 - update to 3.4.0