diff --git a/dolfin.spec b/dolfin.spec
index ef45d08..5e789fe 100644
--- a/dolfin.spec
+++ b/dolfin.spec
@@ -2,7 +2,7 @@
 Name:		dolfin
 Version:	2019.1.0.post0
 %global fenics_version 2019.1
-Release:        17%{?dist}
+Release:        18%{?dist}
 Summary:        FEniCS computational backend and problem solving environment
 
 License:        LGPLv3+
@@ -11,10 +11,13 @@ 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
+%if 0%{?fedora} >= 33 || 0%{?rhel} >= 9
 %global blaslib flexiblas
+%global cmake_blas_flags -DBLA_VENDOR=FlexiBLAS
 %else
 %global blaslib openblas
+%global blasvar o
+%global cmake_blas_flags -DBLAS_LIBRARIES=%{_libdir}/lib%{blaslib}%{blasvar}.so
 %endif
 
 BuildRequires:  gcc-c++
@@ -100,8 +103,8 @@ 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 .. \
-  -DBLAS_LIBRARIES=-l%{blaslib} \
+CFLAGS="%{optflags} -Wno-unused-variable" %cmake .. \
+  %{cmake_blas_flags} \
   -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=off
 %make_build
 
@@ -165,6 +168,9 @@ ctest -V %{?_smp_mflags}
 %{python3_sitearch}/fenics_dolfin-%{fenics_version}*-py%{python3_version}.egg-info/
 
 %changelog
+* Tue Jul 13 2021 Björn Esser <besser82@fedoraproject.org> - 2019.1.0.post0-18
+- Properly set BLA_VENDOR to FlexiBLAS for cmake >= 3.19
+
 * Fri Jun 04 2021 Python Maint <python-maint@redhat.com> - 2019.1.0.post0-17
 - Rebuilt for Python 3.10