diff --git a/config/coreboot/haswell/patches/0026-use-mirrorservice.org-for-iasl-downloads.patch b/config/coreboot/haswell/patches/0026-use-mirrorservice.org-for-iasl-downloads.patch
new file mode 100644
index 00000000..f9981abd
--- /dev/null
+++ b/config/coreboot/haswell/patches/0026-use-mirrorservice.org-for-iasl-downloads.patch
@@ -0,0 +1,28 @@
+From ed30cca924fa576dd5b69ce4a348b5a1466a8db1 Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Sun, 28 Apr 2024 01:57:46 +0100
+Subject: [PATCH 1/1] use mirrorservice.org for iasl downloads
+
+github is unreliable. i mirror these files myself.
+
+Signed-off-by: Leah Rowe <info@minifree.org>
+---
+ util/crossgcc/buildgcc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
+index 6ae201239d..a8433a25e5 100755
+--- a/util/crossgcc/buildgcc
++++ b/util/crossgcc/buildgcc
+@@ -74,7 +74,7 @@ MPFR_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/mpfr"
+ MPC_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/mpc"
+ GCC_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}"
+ BINUTILS_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/binutils"
+-IASL_BASE_URL="https://github.com/acpica/acpica/archive/refs/tags"
++IASL_BASE_URL="https://www.mirrorservice.org/sites/libreboot.org/release/misc/acpica"
+ # CLANG toolchain archive locations
+ LLVM_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
+ CLANG_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
+-- 
+2.39.2
+
diff --git a/config/coreboot/i945/patches/0023-use-mirrorservice.org-for-iasl-downloads.patch b/config/coreboot/i945/patches/0023-use-mirrorservice.org-for-iasl-downloads.patch
new file mode 100644
index 00000000..012d8dab
--- /dev/null
+++ b/config/coreboot/i945/patches/0023-use-mirrorservice.org-for-iasl-downloads.patch
@@ -0,0 +1,28 @@
+From 781ab8407d08a5fdb7fbc2c239e684def7380b15 Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Sun, 28 Apr 2024 01:59:30 +0100
+Subject: [PATCH 1/1] use mirrorservice.org for iasl downloads
+
+github is unreliable. i mirror these files myself.
+
+Signed-off-by: Leah Rowe <info@minifree.org>
+---
+ util/crossgcc/buildgcc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
+index 0faea86894..6779a20425 100755
+--- a/util/crossgcc/buildgcc
++++ b/util/crossgcc/buildgcc
+@@ -71,7 +71,7 @@ MPFR_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/mpfr"
+ MPC_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/mpc"
+ GCC_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}"
+ BINUTILS_BASE_URL="https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/binutils"
+-IASL_BASE_URL="https://github.com/acpica/acpica/archive/refs/tags"
++IASL_BASE_URL="https://www.mirrorservice.org/sites/libreboot.org/release/misc/acpica"
+ # 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}"
+-- 
+2.39.2
+