diff --git a/macros.pybytecompile b/macros.pybytecompile
index dd8b495..9e5505b 100644
--- a/macros.pybytecompile
+++ b/macros.pybytecompile
@@ -18,7 +18,7 @@
 
 %py_byte_compile()\
 py2_byte_compile () {\
-    python_binary="env PYTHONHASHSEED=0 %1"\
+    python_binary="%{__env_unset_source_date_epoch_if_not_clamp_mtime} PYTHONHASHSEED=0 %1"\
     bytecode_compilation_path="%2"\
     failure=0\
     find $bytecode_compilation_path -type f -a -name "*.py" -print0 | xargs -0 $python_binary -s -c 'import py_compile, sys; [py_compile.compile(f, dfile=f.partition("'"$RPM_BUILD_ROOT"'")[2], doraise=True) for f in sys.argv[1:]]' || failure=1\
@@ -27,13 +27,13 @@ py2_byte_compile () {\
 }\
 \
 py3_byte_compile () {\
-    python_binary="env PYTHONHASHSEED=0 %1"\
+    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 -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes $bytecode_compilation_path \
 }\
 \
 py39_byte_compile () {\
-    python_binary="env PYTHONHASHSEED=0 %1"\
+    python_binary="%{__env_unset_source_date_epoch_if_not_clamp_mtime} PYTHONHASHSEED=0 %1"\
     bytecode_compilation_path="%2"\
     $python_binary -s -B -m compileall -o 0 -o 1 -s $RPM_BUILD_ROOT -p / --hardlink-dupes $bytecode_compilation_path \
 }\
diff --git a/macros.python-srpm b/macros.python-srpm
index 7104f7f..70a04ac 100644
--- a/macros.python-srpm
+++ b/macros.python-srpm
@@ -73,9 +73,12 @@
 ## Should python bytecompilation compile outside python specific directories?
 ## This always causes errors when enabled, see https://fedoraproject.org/wiki/Changes/No_more_automagic_Python_bytecompilation_phase_3
 %_python_bytecompile_extra 0
+## Helper macro to unset $SOURCE_DATE_EPOCH if %%clamp_mtime_to_source_date_epoch is not set
+## https://fedoraproject.org/wiki/Changes/ReproducibleBuildsClampMtimes#Python_bytecode
+%__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 %{_rpmconfigdir}/redhat/brp-python-bytecompile "" "%{?_python_bytecompile_errors_terminate_build}" "%{?_python_bytecompile_extra}"
+%__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}"
 %__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 e7844fc..2191707 100644
--- a/python-rpm-macros.spec
+++ b/python-rpm-macros.spec
@@ -52,7 +52,7 @@ elseif posix.stat('macros.python-srpm') then
 end
 }
 Version:        %{__default_python3_version}
-Release:        6%{?dist}
+Release:        7%{?dist}
 
 BuildArch:      noarch
 
@@ -130,9 +130,10 @@ install -m 755 brp-* %{buildroot}%{_rpmconfigdir}/redhat/
 # It also ensures that:
 #  - our BRPs can execute
 #  - if our BRPs affect this package, we don't need to build it twice
-%global __brp_python_bytecompile %{buildroot}%{__brp_python_bytecompile}
-%global __brp_python_hardlink %{buildroot}%{__brp_python_hardlink}
-%global __brp_fix_pyc_reproducibility %{buildroot}%{__brp_fix_pyc_reproducibility}
+%define add_buildroot() %{lua:print((macros[macros[1]]:gsub(macros._rpmconfigdir, macros.buildroot .. macros._rpmconfigdir)))}
+%global __brp_python_bytecompile %{add_buildroot __brp_python_bytecompile}
+%global __brp_python_hardlink %{add_buildroot __brp_python_hardlink}
+%global __brp_fix_pyc_reproducibility %{add_buildroot __brp_fix_pyc_reproducibility}
 
 
 %check
@@ -159,6 +160,9 @@ grep -E '^#[^%%]*%%[^%%]' %{buildroot}%{rpmmacrodir}/macros.* && exit 1 || true
 
 
 %changelog
+* Mon Dec 19 2022 Miro Hrončok <mhroncok@redhat.com> - 3.11-7
+- Bytecompilation: Unset $SOURCE_DATE_EPOCH when %%clamp_mtime_to_source_date_epoch is not set
+
 * Sun Nov 13 2022 Miro Hrončok <mhroncok@redhat.com> - 3.11-6
 - Set PYTEST_XDIST_AUTO_NUM_WORKERS=%%{_smp_build_ncpus} from %%pytest
 - pytest-xdist 3+ respects this value when -n auto is used