diff --git a/extra/js78/PKGBUILD b/extra/js78/PKGBUILD
index 9233dc81b..a541465a0 100644
--- a/extra/js78/PKGBUILD
+++ b/extra/js78/PKGBUILD
@@ -5,7 +5,7 @@
 #  - patch to fix build on ARM
 
 pkgname=js78
-pkgver=78.11.0
+pkgver=78.12.0
 pkgrel=1
 pkgdesc="JavaScript interpreter and libraries - Version 78"
 arch=(x86_64)
@@ -17,12 +17,10 @@ checkdepends=(mercurial git)
 _relver=${pkgver}esr
 source=(https://archive.mozilla.org/pub/firefox/releases/$_relver/source/firefox-$_relver.source.tar.xz{,.asc}
         0001-Fixes-for-LTO-PGO-support.patch
-        0002-Bug-1667736-Update-packed_simd-to-compile-on-Rust-1..patch
         arm.patch)
-sha256sums=('38394b5937be3839104b3a097d71987c06392d4d8be0d3004182f1d1fbfc577e'
+sha256sums=('8b55a8b8254ddde03db83f44c9fecfc4ae86ea126b5445a0355d915830bd7410'
             'SKIP'
             '926a573eabe3b6177363b795ed5e5641b4a4ebc6d7cfa093f11e1779ac0f897c'
-            '5f7c132fe7dab5e412cfd24c0c542531d4bfbcf030c736d46993845ba262cf9c'
             'bc00516032330760444939c516a60c78f868631e1b37f075f0fe71a53737b966')
 validpgpkeys=('14F26682D0916CDD81E37B6D61B7B526D98F0353') # Mozilla Software Releases <release@mozilla.com>
 
@@ -36,9 +34,6 @@ prepare() {
 
   # Post-78 fixes to fix LTO with LLVM 11
   patch -Np1 -i ../0001-Fixes-for-LTO-PGO-support.patch
-
-  # Fix build with Rust 1.48
-  patch -Np1 -i ../0002-Bug-1667736-Update-packed_simd-to-compile-on-Rust-1..patch
 }
 
 build() {