Index: python-biopython/PKGBUILD
===================================================================
--- python-biopython.orig/PKGBUILD
+++ python-biopython/PKGBUILD
@@ -24,6 +24,7 @@ build() {
 
 package() {
   cd "${srcdir}/${_pkgname}-${pkgver}"
+  export PYTHONHASHSEED=0
   python setup.py install --root="${pkgdir}"
   install -Dm644 "LICENSE.rst" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
 }