diff --git a/dolfin.spec b/dolfin.spec
index 6a28bec..4fa45a7 100644
--- a/dolfin.spec
+++ b/dolfin.spec
@@ -2,7 +2,7 @@
 Name:		dolfin
 Version:	2019.1.0.post0
 %global fenics_version 2019.1
-Release:        9%{?dist}
+Release:        10%{?dist}
 Summary:        FEniCS computational backend and problem solving environment
 
 License:        LGPLv3+
@@ -11,6 +11,12 @@ Source0:        https://bitbucket.org/fenics-project/dolfin/downloads/dolfin-%{v
 Source1:        https://bitbucket.org/fenics-project/dolfin/downloads/dolfin-%{version}.tar.gz.asc
 Source2:        3083BE4C722232E28AD0828CBED06106DD22BAB3.gpg
 
+%if 0%{?fedora} >= 33
+%global blaslib flexiblas
+%else
+%global blaslib openblas
+%endif
+
 BuildRequires:  gcc-c++
 BuildRequires:  gnupg2
 BuildRequires:  cmake
@@ -20,8 +26,7 @@ BuildRequires:  petsc-devel
 BuildRequires:  sundials-devel
 BuildRequires:  scotch-devel
 # ptscotch-mpich-devel?
-BuildRequires:  blas-devel
-# openblas-devel?
+BuildRequires:  %{blaslib}-devel
 BuildRequires:  hdf5-devel
 # hdf5-mpich-devel?
 BuildRequires:  zlib-devel
@@ -94,7 +99,9 @@ sed -r -i 's|boost/detail/endian.hpp|boost/endian/arithmetic.hpp|' \
 %build
 # %%_mpich_load
 mkdir -p build && cd build
-CFLAGS=-Wno-unused-variable %cmake .. -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=off
+CFLAGS=-Wno-unused-variable %cmake .. \
+  -DBLAS_LIBRARIES=-l%{blaslib} \
+  -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=off
 %make_build
 
 # "temporary install" so the python build can find the stuff it needs
@@ -157,6 +164,9 @@ ctest -V %{?_smp_mflags}
 %{python3_sitearch}/fenics_dolfin-%{fenics_version}*-py%{python3_version}.egg-info/
 
 %changelog
+* Thu Aug 27 2020 Iñaki Úcar <iucar@fedoraproject.org> - 2019.1.0.post0-10
+- https://fedoraproject.org/wiki/Changes/FlexiBLAS_as_BLAS/LAPACK_manager
+
 * Tue Aug 04 2020 Gwyn Ciesla <gwync@protonmail.com> - 2019.1.0.post0-9
 - Fix FTBFS.