diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
index 50d11ff39d84..ba2539c38332 100644
--- a/pkgs/applications/networking/browsers/chromium/common.nix
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -246,17 +246,9 @@ let
       # (we currently package 1.26 in Nixpkgs while Chromium bundles 1.21):
       # Source: https://bugs.chromium.org/p/angleproject/issues/detail?id=7582#c1
       ./patches/angle-wayland-include-protocol.patch
-    ] ++ lib.optionals (!chromiumVersionAtLeast "120") [
-      # We need to revert this patch to build M114+ with LLVM 16:
-      (githubPatch {
-        # Reland [clang] Disable autoupgrading debug info in ThinLTO builds
-        commit = "54969766fd2029c506befc46e9ce14d67c7ed02a";
-        hash = "sha256-Vryjg8kyn3cxWg3PmSwYRG6zrHOqYWBMSdEMGiaPg6M=";
-        revert = true;
-      })
     ] ++ lib.optionals (chromiumVersionAtLeast "120") [
-      # We need to revert this patch to build M120+ with LLVM 16:
-      ./patches/chromium-120-llvm-16.patch
+      # We need to revert this patch to build M120+ with LLVM 17:
+      ./patches/chromium-120-llvm-17.patch
     ] ++ lib.optionals (!chromiumVersionAtLeast "119.0.6024.0") [
       # Fix build with at-spi2-core ≥ 2.49
       # This version is still needed for electron.
diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index c1ac2dee602c..f592344bdf65 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -26,7 +26,7 @@ let
   # Sometimes we access `llvmPackages` via `pkgs`, and other times
   # via `pkgsFooBar`, so a string (attrname) is the only way to have
   # a single point of control over the LLVM version used.
-  llvmPackages_attrName = "llvmPackages_16";
+  llvmPackages_attrName = "llvmPackages_17";
   stdenv = pkgs.${llvmPackages_attrName}.stdenv;
 
   # Helper functions for changes that depend on specific versions:
diff --git a/pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-16.patch b/pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-17.patch
similarity index 63%
rename from pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-16.patch
rename to pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-17.patch
index 99a8c521a08a..921ffe451139 100644
--- a/pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-16.patch
+++ b/pkgs/applications/networking/browsers/chromium/patches/chromium-120-llvm-17.patch
@@ -27,17 +27,3 @@ index de1cd6e..bb5700b 100644
      # TODO(crbug.com/1235145): Investigate why/if this should be needed.
      if (is_win) {
        cflags += [ "/clang:-ffp-contract=off" ]
-@@ -800,13 +782,6 @@ config("compiler") {
-       if (is_apple) {
-         ldflags += [ "-Wcrl,object_path_lto" ]
-       }
--      if (!is_chromeos) {
--        # TODO(https://crbug.com/972449): turn on for ChromeOS when that
--        # toolchain has this flag.
--        # We only use one version of LLVM within a build so there's no need to
--        # upgrade debug info, which can be expensive since it runs the verifier.
--        ldflags += [ "-Wl,-mllvm,-disable-auto-upgrade-debug-info" ]
--      }
-     }
- 
-     # TODO(https://crbug.com/1211155): investigate why this isn't effective on