diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index e994e7630a..ee458def04 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -39,7 +39,7 @@ MPFR_VERSION=4.2.0
 MPC_VERSION=1.3.1
 GCC_VERSION=11.3.0
 BINUTILS_VERSION=2.40
-IASL_VERSION=20230628
+IASL_VERSION="R06_28_23"
 # CLANG version number
 CLANG_VERSION=16.0.6
 CMAKE_VERSION=3.26.4
@@ -51,7 +51,7 @@ MPFR_ARCHIVE="mpfr-${MPFR_VERSION}.tar.xz"
 MPC_ARCHIVE="mpc-${MPC_VERSION}.tar.gz"
 GCC_ARCHIVE="gcc-${GCC_VERSION}.tar.xz"
 BINUTILS_ARCHIVE="binutils-${BINUTILS_VERSION}.tar.xz"
-IASL_ARCHIVE="acpica-unix2-${IASL_VERSION}.tar.gz"
+IASL_ARCHIVE="${IASL_VERSION}.tar.gz"
 # CLANG toolchain FILE locations
 LLVM_ARCHIVE="llvm-${CLANG_VERSION}.src.tar.xz"
 CLANG_ARCHIVE="clang-${CLANG_VERSION}.src.tar.xz"
@@ -71,7 +71,7 @@ MPFR_BASE_URL="https://ftpmirror.gnu.org/mpfr"
 MPC_BASE_URL="https://ftpmirror.gnu.org/mpc"
 GCC_BASE_URL="https://ftpmirror.gnu.org/gcc/gcc-${GCC_VERSION}"
 BINUTILS_BASE_URL="https://ftpmirror.gnu.org/binutils"
-IASL_BASE_URL="https://acpica.org/sites/acpica/files"
+IASL_BASE_URL="https://github.com/acpica/acpica/archive/refs/tags"
 # CLANG toolchain archive locations
 LLVM_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
 CLANG_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
@@ -94,7 +94,7 @@ MPC_DIR="mpc-${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-unix2-20230628_iasl.patch b/util/crossgcc/patches/acpica-R06_28_23_iasl.patch
similarity index 100%
rename from util/crossgcc/patches/acpica-unix2-20230628_iasl.patch
rename to util/crossgcc/patches/acpica-R06_28_23_iasl.patch
diff --git a/util/crossgcc/sum/R06_28_23.tar.gz.cksum b/util/crossgcc/sum/R06_28_23.tar.gz.cksum
new file mode 100644
index 0000000000..37fa6ccfee
--- /dev/null
+++ b/util/crossgcc/sum/R06_28_23.tar.gz.cksum
@@ -0,0 +1 @@
+e37c8dd560bacb0190f2a0306a64f63564206c65  tarballs/R06_28_23.tar.gz
diff --git a/util/crossgcc/sum/acpica-unix2-20230628.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20230628.tar.gz.cksum
deleted file mode 100644
index e4a83af66e..0000000000
--- a/util/crossgcc/sum/acpica-unix2-20230628.tar.gz.cksum
+++ /dev/null
@@ -1 +0,0 @@
-7bdf0962efd6a24f36a5f7e366cc7257e3e6f23d  tarballs/acpica-unix2-20230628.tar.gz