diff --git a/boost/PKGBUILD b/boost/PKGBUILD
index 48e1c5b40c..34d9ab8a9e 100644
--- a/boost/PKGBUILD
+++ b/boost/PKGBUILD
@@ -11,8 +11,8 @@
 # Contributor: Luca Roccia <little_rock@users.sourceforge.net>
 
 pkgname=('boost' 'boost-libs')
-pkgver=1.80.0
-pkgrel=3.1
+pkgver=1.81.0
+pkgrel=2
 _srcname=boost_${pkgver//./_}
 pkgdesc="Free peer-reviewed portable C++ source libraries"
 arch=(x86_64 powerpc64le powerpc64 powerpc riscv64)
@@ -21,19 +21,26 @@ license=('custom')
 makedepends=('icu' 'python' 'python-numpy' 'bzip2' 'zlib' 'openmpi' 'zstd')
 options=(!distcc)
 source=(https://boostorg.jfrog.io/artifactory/main/release/$pkgver/source/$_srcname.tar.bz2
+        boost-1.81.0-phoenix-multiple-definitions.patch
         $pkgname-ublas-c++20-iterator.patch::https://github.com/boostorg/ublas/commit/a31e5cffa85f.patch)
-sha256sums=('1e19565d82e43bc59209a168f5ac899d3ba471d55c7610c677d4ccf2c9c500c0'
+sha256sums=('71feeed900fbccca04a3b4f2f84a7c217186f28a940ed8b7ed4725986baf99fa'
+            '3ebf428ef6be090a7b56a233330375539ac429333b83708e28fe5db049cfecdb'
             'aa38addb40d5f44b4a8472029b475e7e6aef1c460509eb7d8edf03491dc1b5ee')
 
 prepare() {
   cd $_srcname
 
+  # https://github.com/boostorg/phoenix/issues/111
+  patch -Np1 -i ../boost-1.81.0-phoenix-multiple-definitions.patch
+
   # https://github.com/boostorg/ublas/pull/97
   patch -Np2 -i ../$pkgname-ublas-c++20-iterator.patch
 }
 
 build() {
   local JOBS="$(sed 's/.*\(-j *[0-9]\+\).*/\1/' <<<$MAKEFLAGS)"
+  local python_version=$(
+    python -c 'import sys; print(".".join(map(str, sys.version_info[:2])))')
 
   pushd $_srcname/tools/build
   ./bootstrap.sh --cxxflags="$CXXFLAGS $LDFLAGS"
@@ -59,7 +66,7 @@ build() {
     runtime-link=shared \
     link=shared,static \
     toolset=gcc \
-    python=3.10 \
+    python=$python_version \
     cflags="$CPPFLAGS $CFLAGS -fPIC -O3 -ffat-lto-objects" \
     cxxflags="$CPPFLAGS $CXXFLAGS -fPIC -O3 -ffat-lto-objects" \
     linkflags="$LDFLAGS" \
@@ -106,17 +113,17 @@ package_boost-libs() {
     libboost_stacktrace_addr2line.so libboost_stacktrace_basic.so
     libboost_stacktrace_noop.so libboost_system.so libboost_thread.so
     libboost_timer.so libboost_type_erasure.so libboost_unit_test_framework.so
-    libboost_wave.so libboost_wserialization.so)
+    libboost_url.so libboost_wave.so libboost_wserialization.so)
 
   install -dm755 "$pkgdir"/usr/lib
   cp -a fakeinstall/lib/*.so.* "$pkgdir"/usr/lib/
 
   # https://github.com/boostorg/mpi/issues/112
-  install -d "$pkgdir"/usr/lib/python3.10/site-packages/boost
-  touch "$pkgdir"/usr/lib/python3.10/site-packages/boost/__init__.py
-  python -m compileall -o 0 -o 1 -o 2 "$pkgdir"/usr/lib/python3.10/site-packages/boost
-  cp fakeinstall/lib/boost-python3.10/mpi.so \
-    "$pkgdir"/usr/lib/python3.10/site-packages/boost/mpi.so
+  local site_packages=$(python -c 'import site; print(site.getsitepackages()[0])')
+  install -d "$pkgdir"$site_packages/boost
+  touch "$pkgdir"$site_packages/boost/__init__.py
+  python -m compileall -o 0 -o 1 -o 2 "$pkgdir"$site_packages/boost
+  cp fakeinstall/lib/boost-python*/mpi.so "$pkgdir"$site_packages/boost/mpi.so
 
   install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" $_srcname/LICENSE_1_0.txt
 }
diff --git a/boost/boost-1.81.0-phoenix-multiple-definitions.patch b/boost/boost-1.81.0-phoenix-multiple-definitions.patch
new file mode 100644
index 0000000000..0aedde6d07
--- /dev/null
+++ b/boost/boost-1.81.0-phoenix-multiple-definitions.patch
@@ -0,0 +1,11 @@
+https://bugs.gentoo.org/887041
+https://github.com/boostorg/phoenix/issues/111
+--- a/boost/phoenix/stl.hpp
++++ b/boost/phoenix/stl.hpp
+@@ -11,6 +11,5 @@
+ 
+ #include <boost/phoenix/stl/algorithm.hpp>
+ #include <boost/phoenix/stl/container.hpp>
+-#include <boost/phoenix/stl/tuple.hpp>
+ 
+ #endif