diff --git a/macros.pybytecompile b/macros.pybytecompile
index e5e5a47..e81ddae 100644
--- a/macros.pybytecompile
+++ b/macros.pybytecompile
@@ -35,18 +35,18 @@ py2_byte_compile () {\
 py34_byte_compile () {\
     python_binary="%{__env_unset_source_date_epoch_if_not_clamp_mtime} PYTHONHASHSEED=0 %1"\
     bytecode_compilation_path="%2"\
-    PYTHONPATH="%{_rpmconfigdir}/redhat" $python_binary -s -B -m compileall2 %{?_smp_mflags} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes $bytecode_compilation_path \
+    PYTHONPATH="%{_rpmconfigdir}/redhat" $python_binary -s -B -m compileall2 %{?_smp_build_ncpus:-j%{_smp_build_ncpus}} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes $bytecode_compilation_path \
 }\
 py37_byte_compile () {\
     python_binary="%{__env_unset_source_date_epoch_if_not_clamp_mtime} PYTHONHASHSEED=0 %1"\
     bytecode_compilation_path="%2"\
-    PYTHONPATH="%{_rpmconfigdir}/redhat" $python_binary -s -B -m compileall2 %{?_smp_mflags} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes --invalidation-mode=timestamp $bytecode_compilation_path \
+    PYTHONPATH="%{_rpmconfigdir}/redhat" $python_binary -s -B -m compileall2 %{?_smp_build_ncpus:-j%{_smp_build_ncpus}} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes --invalidation-mode=timestamp $bytecode_compilation_path \
 }\
 \
 py39_byte_compile () {\
     python_binary="%{__env_unset_source_date_epoch_if_not_clamp_mtime} PYTHONHASHSEED=0 %1"\
     bytecode_compilation_path="%2"\
-    $python_binary -s -B -m compileall %{?_smp_mflags} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes --invalidation-mode=timestamp $bytecode_compilation_path \
+    $python_binary -s -B -m compileall %{?_smp_build_ncpus:-j%{_smp_build_ncpus}} -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes --invalidation-mode=timestamp $bytecode_compilation_path \
 }\
 \
 # Path to intepreter should not contain any arguments \
diff --git a/macros.python-srpm b/macros.python-srpm
index 5e57102..37cf09a 100644
--- a/macros.python-srpm
+++ b/macros.python-srpm
@@ -78,7 +78,7 @@
 %__env_unset_source_date_epoch_if_not_clamp_mtime %[0%{?clamp_mtime_to_source_date_epoch} == 0 ? "env -u SOURCE_DATE_EPOCH" : "env"]
 
 ## The individual BRP scripts
-%__brp_python_bytecompile %{__env_unset_source_date_epoch_if_not_clamp_mtime} %{_rpmconfigdir}/redhat/brp-python-bytecompile "" "%{?_python_bytecompile_errors_terminate_build}" "%{?_python_bytecompile_extra}" "%{?_smp_mflags}"
+%__brp_python_bytecompile %{__env_unset_source_date_epoch_if_not_clamp_mtime} %{_rpmconfigdir}/redhat/brp-python-bytecompile "" "%{?_python_bytecompile_errors_terminate_build}" "%{?_python_bytecompile_extra}" "%{?_smp_build_ncpus:-j%{_smp_build_ncpus}}"
 %__brp_fix_pyc_reproducibility %{_rpmconfigdir}/redhat/brp-fix-pyc-reproducibility
 %__brp_python_hardlink %{_rpmconfigdir}/redhat/brp-python-hardlink
 
diff --git a/python-rpm-macros.spec b/python-rpm-macros.spec
index abf5ba1..b53f7df 100644
--- a/python-rpm-macros.spec
+++ b/python-rpm-macros.spec
@@ -53,7 +53,7 @@ elseif posix.stat('macros.python-srpm') then
 end
 }
 Version:        %{__default_python3_version}
-Release:        9%{?dist}
+Release:        10%{?dist}
 
 BuildArch:      noarch
 
@@ -163,6 +163,10 @@ grep -E '^#[^%%]*%%[^%%]' %{buildroot}%{rpmmacrodir}/macros.* && exit 1 || true
 
 
 %changelog
+* Thu Mar 16 2023 Miro Hrončok <mhroncok@redhat.com> - 3.11-10
+- Don't assume %%_smp_mflags only ever contains -jX, use -j%%_smp_build_ncpus directly
+- Fixes: rhbz#2179149
+
 * Fri Jan 20 2023 Miro Hrončok <mhroncok@redhat.com> - 3.11-9
 - Memoize values of macros that execute python to get their value
 - Fixes: rhbz#2155505