diff --git a/petsc.spec b/petsc.spec
index 3b0ab88..db87cf0 100644
--- a/petsc.spec
+++ b/petsc.spec
@@ -629,6 +629,10 @@ pushd %{name}-%{version}
 popd
 
 %build
+%ifarch %{arm}
+# Likely running out of memory during build
+%global _lto_cflags %{nil}
+%endif
 pushd %{name}-%{version}
 %configure --with-cc=gcc --with-cxx=g++ --with-fc=gfortran \
  %{petsc_build_options} \
@@ -661,10 +665,6 @@ pushd %{name}-%{version}
 ##
 
 RPM_BUILD_NCPUS="`%{_bindir}/getconf _NPROCESSORS_ONLN`"
-%ifarch %{arm}
-# Likely running out of memory during build
-[ $RPM_BUILD_NCPUS -gt 3 ] && RPM_BUILD_NCPUS=3
-%endif
 make \
  V=1 MAKE_NP=$RPM_BUILD_NCPUS PETSC_DIR=%{_builddir}/%{name}-%{version}/%{name}-%{version} PETSC_ARCH=%{_arch} all
 popd