diff --git a/PKGBUILD b/PKGBUILD
index f60a5e7..6225d27 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -30,15 +30,23 @@ makedepends=(
 )
 source=(
   git+https://github.com/$_name/$_name.git#commit=$_commit
+  polyfill-main-loop.patch
 )
-sha256sums=('SKIP')
-sha512sums=('SKIP')
+sha256sums=('SKIP'
+            '358bdfbc56051c0297cb4fd9644a63aaa4ec0dd3737f6a9ed0cb10f1488b4e5e')
+sha512sums=('SKIP'
+            '6073083d89048072212901e7254295158c7018e88be184858e7e22ceb84435103f5f37808e210537896d52b23fec3308752086e0c59f6dffb01e6bb36aee62a0')
 
 pkgver() {
   cd $_name
   git describe --long --abbrev=7 | sed 's/^release-//;s/\([^-]*-g\)/r\1/;s/-/./g'
 }
 
+prepare() {
+  cd $_name
+  patch -Np1 -i ../polyfill-main-loop.patch
+}
+
 build() {
   cd $_name
   python -m build --wheel --no-isolation