diff --git a/fftw.spec b/fftw.spec
index a6e98eb..0e8e988 100644
--- a/fftw.spec
+++ b/fftw.spec
@@ -28,6 +28,16 @@ BuildRequires:  gcc-gfortran
 %global quad 1
 %endif
 
+# Names of precisions to (maybe) build
+%global prec_names prec_name[0]=single;prec_name[1]=double;prec_name[2]=long;prec_name[3]=quad
+# Number of precisions to build; sometimes quad is not possible
+%global nprec 3
+%if %{quad}
+%global nprec 4
+%endif
+# Number of precisions to build for MPI
+%global nmpiprec 3
+
 # For check phase
 BuildRequires:  time
 BuildRequires:  perl-interpreter
@@ -277,11 +287,7 @@ export F77=gfortran
 BASEFLAGS="--enable-shared --disable-dependency-tracking --enable-threads"
 BASEFLAGS+=" --enable-openmp"
 
-# Precisions to build
-prec_name[0]=single
-prec_name[1]=double
-prec_name[2]=long
-prec_name[3]=quad
+%prec_names
 
 # Corresponding flags
 prec_flags[0]=--enable-single
@@ -311,11 +317,7 @@ done
 #%endif
 
 # Loop over precisions
-%if %{quad}
-for ((iprec=0; iprec<4; iprec++)) ; do
-%else
-for ((iprec=0; iprec<3; iprec++)) ; do
-%endif
+for ((iprec=0; iprec<%{nprec}; iprec++)) ; do
     mkdir ${prec_name[iprec]}${ver_name[iver]}
     cd ${prec_name[iprec]}${ver_name[iver]}
     ln -s ../configure .
@@ -330,7 +332,7 @@ done
 for mpi in %{mpi_list} ; do
     module load mpi/${mpi}-%{_arch}
     # Loop over precisions - no quad precision support with MPI
-    for((iprec=0;iprec<3;iprec++)) ; do
+    for((iprec=0;iprec<%{nmpiprec};iprec++)) ; do
         mkdir ${mpi}-${prec_name[iprec]}${ver_name[iver]}
         cd ${mpi}-${prec_name[iprec]}${ver_name[iver]}
         ln -s ../configure .
@@ -351,23 +353,21 @@ for mpi in %{mpi_list} ; do
 done
 
 %install
+%prec_names
+
 # Explicitly load shell support for the environment-modules package, used
 # below via 'module' pseudo-command.
 source /etc/profile.d/modules.sh
 
-%if %{quad}
-for ver in single double long quad ; do
-%else
-for ver in single double long ; do
-%endif
-    %make_install -C $ver
+for((iprec=0;iprec<%{nprec};iprec++)) ; do
+    %make_install -C ${prec_name[iprec]}
 done
 
 # MPI
 for mpi in %{mpi_list} ; do
     module load mpi/${mpi}-%{_arch}
-    for ver in single double long ; do
-        %make_install -C ${mpi}-${ver}
+    for((iprec=0;iprec<%{nmpiprec};iprec++)) ; do
+        %make_install -C ${mpi}-${prec_name[iprec]}
         # Remove duplicated non-mpi libraries, binaries, and data
         find %{buildroot}%{_libdir}/${mpi}/lib -name libfftw\* -a \! -name \*_mpi.\* -delete
         rm -r %{buildroot}%{_libdir}/${mpi}/{bin,share}
@@ -379,18 +379,15 @@ rm -f %{buildroot}%{_infodir}/dir
 find %{buildroot} -name \*.la -delete
 
 %check
+%prec_names
 # Explicitly load shell support for the environment-modules package, used
 # below via 'module' pseudo-command.
 . /etc/profile.d/modules.sh
 
 bdir=$(pwd)
-%if %{quad}
-for ver in single double long quad ; do
-%else
-for ver in single double long ; do
-%endif
-    export LD_LIBRARY_PATH=$bdir/$ver/.libs:$bdir/$ver/threads/.libs
-    %make_build -C $ver check
+for((iprec=0;iprec<%{nprec};iprec++)) ; do
+    export LD_LIBRARY_PATH=$bdir/${prec_name[iprec]}/.libs:$bdir/${prec_name[iprec]}/threads/.libs
+    %make_build -C ${prec_name[iprec]} check
 done
 
 # MPI
@@ -398,9 +395,9 @@ done
 export OMPI_MCA_rmaps_base_oversubscribe=1
 for mpi in %{mpi_list} ; do
     module load mpi/${mpi}-%{_arch}
-    for ver in single double long ; do
-        export LD_LIBRARY_PATH=$bdir/$ver/.libs:$bdir/$ver/threads/.libs
-        %make_build -C ${mpi}-${ver}/mpi check
+    for((iprec=0;iprec<%{nmpiprec};iprec++)) ; do
+        export LD_LIBRARY_PATH=$bdir/${prec_name[iprec]}/.libs:$bdir/${prec_name[iprec]}/threads/.libs
+        %make_build -C ${mpi}-${prec_name[iprec]}/mpi check
     done
     module unload mpi/${mpi}-%{_arch}
 done
@@ -527,6 +524,7 @@ done
 * Mon Mar 27 2023 Trent Piepho <tpiepho@gmail.com> - 3.3.10-6
 - Enable AVX2 on x86-86
 - Enable NEON on aarch64
+- Clean up precision list
 
 * Thu Mar 02 2023 Orion Poplawski <orion@nwra.com> - 3.3.10-5
 - Use make macros