diff --git a/redhat/opm-core.spec b/redhat/opm-core.spec
index 2911e1bc..fd2aed7c 100644
--- a/redhat/opm-core.spec
+++ b/redhat/opm-core.spec
@@ -13,11 +13,11 @@ Group:          Development/Libraries/C and C++
 Url:            http://www.opm-project.org/
 Source0:        https://github.com/OPM/%{name}/archive/release/%{version}/%{tag}.tar.gz#/%{name}-%{version}.tar.gz
 BuildRequires:  blas-devel lapack-devel dune-common-devel
-BuildRequires:  git suitesparse-devel cmake28 doxygen bc
-BuildRequires:  tinyxml-devel dune-istl-devel ert.ecl-devel
+BuildRequires:  git suitesparse-devel doxygen bc opm-material-devel
+BuildRequires:  tinyxml-devel dune-istl-devel ert.ecl-devel opm-common-devel
 BuildRequires:  opm-parser-devel opm-material-devel boost148-devel
-%{?el5:BuildRequires: gcc44 gcc44-c++}
-%{!?el5:BuildRequires: gcc gcc-c++}
+%{?el6:BuildRequires:  cmake28 devtoolset-2}
+%{?!el6:BuildRequires:  cmake gcc gcc-gfortran gcc-c++}
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Requires:       libopm-core1 = %{version}
 
@@ -27,7 +27,6 @@ The Open Porous Media (OPM) initiative provides a set of open-source tools cente
 %package -n libopm-core1
 Summary:        Open Porous Media - core library
 Group:          System/Libraries
-%{?el5:BuildArch: %{_arch}}
 
 %description -n libopm-core1
 The Open Porous Media (OPM) initiative provides a set of open-source tools centered around the simulation of flow and transport of fluids in porous media. The goal of the initiative is to establish a sustainable environment for the development of an efficient and well-maintained software suite.
@@ -40,7 +39,6 @@ Requires:       blas-devel
 Requires:       lapack-devel
 Requires:       suitesparse-devel
 Requires:       libopm-core1 = %{version}
-%{?el5:BuildArch: 	%{_arch}}
 
 %description devel
 This package contains the development and header files for opm-core
@@ -58,29 +56,17 @@ Summary:        Applications in opm-core
 Group:          Scientific
 Requires:       %{name} = %{version}
 Requires:       libopm-core1 = %{version}
-%{?el5:BuildArch: 	%{_arch}}
 
 %description bin
 This package contains the applications for opm-core
 
-%{?el5:
-%package debuginfo
-Summary:        Debug info in opm-core
-Group:          Scientific
-Requires:       %{name} = %{version}
-Requires:       libopm-core1 = %{version}, opm-core-bin = %{version}
-BuildArch: 	%{_arch}
-
-%description debuginfo
-This package contains the debug symbols for opm-core
-}
-
 %prep
 %setup -q -n %{name}-release-%{version}-%{tag}
 
 # consider using -DUSE_VERSIONED_DIR=ON if backporting
 %build
-cmake28 -DBUILD_SHARED_LIBS=1 -DCMAKE_BUILD_TYPE=RelWithDebInfo  -DSTRIP_DEBUGGING_SYMBOLS=ON -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_INSTALL_DOCDIR=share/doc/%{name}-%{version} -DUSE_RUNPATH=OFF %{?el5:-DCMAKE_CXX_COMPILER=g++44 -DCMAKE_C_COMPILER=gcc44 -DCMAKE_Fortran_COMPILER=gfortran44} -DBOOST_LIBRARYDIR=%{_libdir}/boost148 -DBOOST_INCLUDEDIR=/usr/include/boost148
+%{?el6:scl enable devtoolset-2 bash}
+%{?el6:cmake28} %{!?el6:cmake} -DBUILD_SHARED_LIBS=1 -DCMAKE_BUILD_TYPE=RelWithDebInfo  -DSTRIP_DEBUGGING_SYMBOLS=ON -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_INSTALL_DOCDIR=share/doc/%{name}-%{version} -DUSE_RUNPATH=OFF %{?el6:-DCMAKE_CXX_COMPILER=/opt/rh/devtoolset-2/root/usr/bin/g++ -DCMAKE_C_COMPILER=/opt/rh/devtoolset-2/root/usr/bin/gcc -DCMAKE_Fortran_COMPILER=/opt/rh/devtoolset-2/root/usr/bin/gfortran} -DBOOST_LIBRARYDIR=%{_libdir}/boost148 -DBOOST_INCLUDEDIR=/usr/include/boost148
 make
 
 %install
@@ -114,8 +100,3 @@ rm -rf %{buildroot}
 
 %files bin
 %{_bindir}/*
-
-%{?el5:
-%files debuginfo
-/usr/lib/debug/%{_libdir}/*.so.*.debug
-}