diff --git a/python-fastavro.spec b/python-fastavro.spec
index 6ec4e40..514fe76 100644
--- a/python-fastavro.spec
+++ b/python-fastavro.spec
@@ -116,10 +116,10 @@ sed -r -i '/^check-manifest$/d' developer_requirements.txt
 export FASTAVRO_USE_CYTHON=1
 %pyproject_wheel
 
-PYTHONPATH="${PWD}/build/lib.%{python3_platform}-%{python3_version}" \
+PYTHONPATH="%{pyproject_build_lib}" \
     %make_build -C docs man SPHINXOPTS='%{?_smp_mflags}'
 %if %{with doc_pdf}
-PYTHONPATH="${PWD}/build/lib.%{python3_platform}-%{python3_version}" \
+PYTHONPATH="%{pyproject_build_lib}" \
     %make_build -C docs latex SPHINXOPTS='%{?_smp_mflags}'
 %make_build -C docs/_build/latex LATEXMKOPTS='-quiet'
 %endif