diff --git a/mingw-w64-prjtrellis/.gitignore b/mingw-w64-prjtrellis/.gitignore
new file mode 100644
index 0000000000..ebb28691d5
--- /dev/null
+++ b/mingw-w64-prjtrellis/.gitignore
@@ -0,0 +1 @@
+prjtrellis-db
diff --git a/mingw-w64-prjtrellis/001-fix-build-with-boost-built-with-cmake.patch b/mingw-w64-prjtrellis/001-fix-build-with-boost-built-with-cmake.patch
new file mode 100644
index 0000000000..91c728a949
--- /dev/null
+++ b/mingw-w64-prjtrellis/001-fix-build-with-boost-built-with-cmake.patch
@@ -0,0 +1,10 @@
+--- a/libtrellis/CMakeLists.txt
++++ b/libtrellis/CMakeLists.txt
+@@ -52,7 +52,6 @@
+ else()
+     add_definitions(-DNO_THREADS)
+ endif()
+-set(Boost_NO_BOOST_CMAKE ON)
+ 
+ find_package(Python3 3.5 REQUIRED COMPONENTS Interpreter)
+ if (BUILD_PYTHON)
diff --git a/mingw-w64-prjtrellis/PKGBUILD b/mingw-w64-prjtrellis/PKGBUILD
index 745e194282..f4e288bb30 100644
--- a/mingw-w64-prjtrellis/PKGBUILD
+++ b/mingw-w64-prjtrellis/PKGBUILD
@@ -4,7 +4,7 @@ _realname=prjtrellis
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=1.4
-pkgrel=3
+pkgrel=4
 pkgdesc="Documenting the Lattice ECP5 bit-stream format (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -21,13 +21,18 @@ makedepends=(
   "${MINGW_PACKAGE_PREFIX}-ninja"
   "git"
 )
-_commit_db='35d900a94ff0db152679a67bf6e4fbf40ebc34aa'
+_commit_db='ce8cdafe7a8c718f0ec43895894b668a479ba33f'
 source=("https://github.com/YosysHQ/prjtrellis/archive/${pkgver}/${_realname}-${pkgver}.tar.gz"
-        "${_realname}-db"::"git+https://github.com/YosysHQ/prjtrellis-db.git#commit=${_commit_db}")
+        "${_realname}-db"::"git+https://github.com/YosysHQ/prjtrellis-db.git#commit=${_commit_db}"
+        "001-fix-build-with-boost-built-with-cmake.patch")
 sha256sums=('46fe9d98676953e0cccf1d6332755d217a0861e420f1a12dabfda74d81ccc147'
-            'SKIP')
+            '7f4f327c03ba5daa05d3349f32e7465c3cc1e649d684b1a68884205e0e1eb96c'
+            '779a9b7822b0836be17a6a47726e7892046a59c29a6c4fb5962ad386d500335c')
 
 prepare () {
+  cd "${srcdir}"/${_realname}-${pkgver}
+  patch -p1 -i "${srcdir}"/001-fix-build-with-boost-built-with-cmake.patch
+
   cd "${srcdir}/${_realname}-db"
   cp -r * "${srcdir}/${_realname}-${pkgver}/database/"
 }
@@ -71,5 +76,6 @@ package() {
 
   DESTDIR="${pkgdir}" "${MINGW_PREFIX}"/bin/cmake.exe --install .
 
-  install -Dm644 "${srcdir}/${_realname}-${pkgver}"/COPYING "${pkgdir}${MINGW_PREFIX}"/share/licenses/${_realname}/LICENSE
+  install -Dm644 "${srcdir}/${_realname}-${pkgver}"/COPYING \
+    "${pkgdir}${MINGW_PREFIX}"/share/licenses/${_realname}/LICENSE
 }