diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 0d349f2dfe..6015102308 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -37,7 +37,7 @@ MPFR_VERSION=4.1.1
 MPC_VERSION=1.2.1
 GCC_VERSION=11.2.0
 BINUTILS_VERSION=2.37
-IASL_VERSION=20221020
+IASL_VERSION="R10_20_22"
 # CLANG version number
 CLANG_VERSION=15.0.0
 CMAKE_VERSION=3.24.2
@@ -52,7 +52,7 @@ MPFR_ARCHIVE="https://ftpmirror.gnu.org/mpfr/mpfr-${MPFR_VERSION}.tar.xz"
 MPC_ARCHIVE="https://ftpmirror.gnu.org/mpc/mpc-${MPC_VERSION}.tar.gz"
 GCC_ARCHIVE="https://ftpmirror.gnu.org/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz"
 BINUTILS_ARCHIVE="https://ftpmirror.gnu.org/binutils/binutils-${BINUTILS_VERSION}.tar.xz"
-IASL_ARCHIVE="https://acpica.org/sites/acpica/files/acpica-unix2-${IASL_VERSION}.tar.gz"
+IASL_ARCHIVE="https://github.com/acpica/acpica/archive/refs/tags/${IASL_VERSION}.tar.gz"
 # CLANG toolchain archive locations
 LLVM_ARCHIVE="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}/llvm-${CLANG_VERSION}.src.tar.xz"
 CLANG_ARCHIVE="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}/clang-${CLANG_VERSION}.src.tar.xz"
@@ -75,7 +75,7 @@ MPC_DIR="mpc-${MPC_VERSION}"
 GCC_DIR="gcc-${GCC_VERSION}"
 # shellcheck disable=SC2034
 BINUTILS_DIR="binutils-${BINUTILS_VERSION}"
-IASL_DIR="acpica-unix2-${IASL_VERSION}"
+IASL_DIR="acpica-${IASL_VERSION}"
 # CLANG toolchain directories
 LLVM_DIR="llvm-${CLANG_VERSION}.src"
 CLANG_DIR="clang-${CLANG_VERSION}.src"
diff --git a/util/crossgcc/patches/acpica-unix2-20221020_iasl.patch b/util/crossgcc/patches/acpica-R10_20_22_iasl.patch
similarity index 100%
rename from util/crossgcc/patches/acpica-unix2-20221020_iasl.patch
rename to util/crossgcc/patches/acpica-R10_20_22_iasl.patch
diff --git a/util/crossgcc/sum/R10_20_22.tar.gz.cksum b/util/crossgcc/sum/R10_20_22.tar.gz.cksum
new file mode 100644
index 0000000000..4669dab43c
--- /dev/null
+++ b/util/crossgcc/sum/R10_20_22.tar.gz.cksum
@@ -0,0 +1 @@
+560d9e43692e1957bcf24a9bdd663ffe77da88dd  tarballs/R10_20_22.tar.gz
diff --git a/util/crossgcc/sum/acpica-unix2-20221020.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20221020.tar.gz.cksum
deleted file mode 100644
index 1b2b5804da..0000000000
--- a/util/crossgcc/sum/acpica-unix2-20221020.tar.gz.cksum
+++ /dev/null
@@ -1 +0,0 @@
-bb175ba614e68d43a7a863335e83d3f832d3b41c  tarballs/acpica-unix2-20221020.tar.gz