diff --git a/libcaca/libcaca-fix-instruction-detection.patch b/libcaca/libcaca-fix-instruction-detection.patch
new file mode 100644
index 000000000..5f3fdb5b9
--- /dev/null
+++ b/libcaca/libcaca-fix-instruction-detection.patch
@@ -0,0 +1,39 @@
+From 07cb730bf3dc49170f0c387d9edcf5537a4e26b6 Mon Sep 17 00:00:00 2001
+From: kxxt <rsworktech@outlook.com>
+Date: Wed, 21 Jun 2023 00:06:04 +0800
+Subject: [PATCH] Disable LTO when checking for fsin/fcos/fldln2/...
+
+LTO might interfere with the instruction detection and produce false positives.
+(The conftest.c compiles with `-flto=auto` but fails without it)
+
+The build for riscv64 arch linux fails because of this:
+https://archriscv.felixc.at/.status/log.htm?url=logs/libcaca/libcaca-0.99.beta20-2.log
+
+This PR fixes it.
+---
+ configure.ac | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/configure.ac b/configure.ac
+index 27b8d5b4..ee38ead3 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -145,6 +145,9 @@ AC_COMPILE_IFELSE(
+   AC_DEFINE(HAVE_SLEEP, 1, [Define to 1 if you have the ‘Sleep’ function.])],
+  [AC_MSG_RESULT(no)])
+ 
++# Disable LTO when checking for the instructions
++CFLAGS="${CFLAGS} -fno-lto"
++
+ AC_MSG_CHECKING(for fsin/fcos)
+ AC_COMPILE_IFELSE(
+  [AC_LANG_PROGRAM(
+@@ -163,6 +166,8 @@ AC_COMPILE_IFELSE(
+   AC_DEFINE(HAVE_FLDLN2, 1, [Define to 1 if you have the ‘fldln2’ and other floating point instructions.])],
+  [AC_MSG_RESULT(no)])
+ 
++CFLAGS="${CFLAGS%$' -fno-lto'}"
++
+ AC_CHECK_HEADERS(zlib.h)
+ AC_CHECK_LIB(z, gzopen, [ZLIB_LIBS="${ZLIB_LIBS} -lz"])
+ 
diff --git a/libcaca/riscv64.patch b/libcaca/riscv64.patch
index 779e82acd..eec473cc8 100644
--- a/libcaca/riscv64.patch
+++ b/libcaca/riscv64.patch
@@ -1,14 +1,21 @@
+diff --git PKGBUILD PKGBUILD
+index 5b00085..dc7c30f 100644
 --- PKGBUILD
 +++ PKGBUILD
-@@ -41,3 +41,11 @@ package() {
+@@ -44,6 +44,9 @@ prepare() {
+   # https://github.com/cacalabs/libcaca/pull/66
+   git apply -3 ../libcaca-0.99.beta20-CVE-2022-0856.patch
+ 
++  # Disable LTO when checking for fsin/fcos/fldln2/...
++  git apply -3 ../libcaca-fix-instruction-detection.patch
++
+   autoreconf -fi
+ }
+ 
+@@ -67,3 +70,6 @@ package() {
    make DESTDIR="$pkgdir" install
-   install -Dm644 COPYING "$pkgdir/usr/share/licenses/$pkgname/COPYING"
+   install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname/" COPYING
  }
 +
-+source+=("$pkgname-fix-instruction-detection.patch::https://github.com/cacalabs/libcaca/pull/76.patch")
-+sha256sums+=('2d40a2c2654369e0583f9c26653b56d6b4306d76ad12c78478de489a8f91160b')
-+prepare() {
-+  cd $pkgname-$pkgver
-+  patch -Np1 -i ../$pkgname-fix-instruction-detection.patch
-+  autoreconf -fi
-+}
++source+=("libcaca-fix-instruction-detection.patch")
++b2sums+=("1cfd28a3777cec6cb8f2bab8ae2f6d9496452e40dd7f0f7a7cf67ebef1a4ac48390e63ce464b1283207545fe8fe050f9789cf39202b513d3d22291dc84521f10")