diff --git a/mingw-w64-python-pyrsistent/PKGBUILD b/mingw-w64-python-pyrsistent/PKGBUILD
index c2d6e9eff8..56943ca28c 100644
--- a/mingw-w64-python-pyrsistent/PKGBUILD
+++ b/mingw-w64-python-pyrsistent/PKGBUILD
@@ -7,8 +7,8 @@ pkgname=("${MINGW_PACKAGE_PREFIX}-python-${_realname}")
 provides=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
 conflicts=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
 replaces=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
-pkgver=0.18.0
-pkgrel=2
+pkgver=0.18.1
+pkgrel=1
 pkgdesc="Persistent/Functional/Immutable data structures (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32')
@@ -22,31 +22,30 @@ checkdepends=("${MINGW_PACKAGE_PREFIX}-python-pytest-runner"
               "${MINGW_PACKAGE_PREFIX}-python-hypothesis")
 options=('staticlibs' 'strip' '!debug')
 source=("https://pypi.io/packages/source/p/pyrsistent/pyrsistent-${pkgver}.tar.gz")
-sha512sums=('f56062430f914a884a9317ecf5278ccc09d98f1d6867716f89173db47996b8d4c1ef4f5c0121c955d81fc4fe8aba7d30f38679baea6208168c3952846064cfeb')
+sha512sums=('353ad6e9165e1afdde37730a9289cf8dde28491abb688d702a8c8f5279e24f5ce387a5d00ac4a077322299f9c1a535781bcacdcd1cb914ddb317b3ca9641778b')
 
 prepare() {
-  cd "${srcdir}"
-  rm -rf python-build-${CARCH} | true
-  cp -r "${_realname}-${pkgver}" "python-build-${CARCH}"
+  rm -rf "python-build-${MSYSTEM}" | true
+  cp -r "${_realname}-${pkgver}" "python-build-${MSYSTEM}"
 
   # Set version for setuptools_scm
   export SETUPTOOLS_SCM_PRETEND_VERSION=${pkgver}
 }
 
 build() {
-  msg "Python build for ${CARCH}"
-  cd "${srcdir}/python-build-${CARCH}"
+  msg "Python build for ${MSYSTEM}"
+  cd "${srcdir}/python-build-${MSYSTEM}"
   ${MINGW_PREFIX}/bin/python setup.py build
 }
 
 check() {
-  msg "Python test for ${CARCH}"
-  cd "${srcdir}/python-build-${CARCH}"
+  msg "Python test for ${MSYSTEM}"
+  cd "${srcdir}/python-build-${MSYSTEM}"
   ${MINGW_PREFIX}/bin/python setup.py pytest || warning "tests failed!!"
 }
 
 package() {
-  cd "${srcdir}/python-build-${CARCH}"
+  cd "${srcdir}/python-build-${MSYSTEM}"
   MSYS2_ARG_CONV_EXCL="--prefix=;--install-scripts=;--install-platlib=" \
   ${MINGW_PREFIX}/bin/python setup.py install --prefix=${MINGW_PREFIX} \
     --root="${pkgdir}" --optimize=1 --skip-build