diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 65e7a697ab0..04a0017a350 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -99,7 +99,8 @@ jobs:
     - name: Build
       run: |
         ./y.sh prepare --only-libcore
-        ./y.sh build
+        # TODO: remove --features master when it is back to the default.
+        ./y.sh build --features master
         cargo test
         ./clean_all.sh
 
@@ -121,7 +122,8 @@ jobs:
 
     - name: Run tests
       run: |
-        ./test.sh --release --clean --build-sysroot ${{ matrix.commands }}
+        # TODO: remove --features master when it is back to the default.
+        ./test.sh --features master --release --clean --build-sysroot ${{ matrix.commands }}
 
   duplicates:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/failures.yml b/.github/workflows/failures.yml
index 27864dcadd0..7fcc0bfe75f 100644
--- a/.github/workflows/failures.yml
+++ b/.github/workflows/failures.yml
@@ -125,5 +125,6 @@ jobs:
     - name: Run tests
       id: tests
       run: |
-        ${{ matrix.libgccjit_version.env_extra }} ./test.sh --release --clean --build-sysroot --test-failing-rustc ${{ matrix.libgccjit_version.extra }} | tee output_log
+        # TODO: remove --features master when it is back to the default.
+        ${{ matrix.libgccjit_version.env_extra }} ./test.sh --release --features master --clean --build-sysroot --test-failing-rustc ${{ matrix.libgccjit_version.extra }} | tee output_log
         rg --text "test result" output_log >> $GITHUB_STEP_SUMMARY
diff --git a/.github/workflows/m68k.yml b/.github/workflows/m68k.yml
index 55ee0a21214..51e8c084061 100644
--- a/.github/workflows/m68k.yml
+++ b/.github/workflows/m68k.yml
@@ -114,7 +114,8 @@ jobs:
     - name: Build
       run: |
         ./y.sh prepare --only-libcore --cross
-        ./y.sh build --target-triple m68k-unknown-linux-gnu
+        # TODO: remove --features master when it is back to the default.
+        ./y.sh build --target-triple m68k-unknown-linux-gnu --features master
         CG_GCC_TEST_TARGET=m68k-unknown-linux-gnu cargo test
         ./clean_all.sh
 
@@ -136,4 +137,5 @@ jobs:
 
     - name: Run tests
       run: |
-        ./test.sh --release --clean --build-sysroot ${{ matrix.commands }}
+        # TODO: remove --features master when it is back to the default.
+        ./test.sh --release --features master --clean --build-sysroot ${{ matrix.commands }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ae1134177a7..de37123f951 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -78,7 +78,8 @@ jobs:
     - name: Build
       run: |
         ./y.sh prepare --only-libcore
-        EMBED_LTO_BITCODE=1 ./y.sh build --release --release-sysroot
+        # TODO: remove --features master when it is back to the default.
+        EMBED_LTO_BITCODE=1 ./y.sh build --release --release-sysroot --features master
         cargo test
         ./clean_all.sh
 
@@ -102,4 +103,5 @@ jobs:
 
     - name: Run tests
       run: |
-        EMBED_LTO_BITCODE=1 ./test.sh --release --clean --release-sysroot --build-sysroot ${{ matrix.commands }}
+        # TODO: remove --features master when it is back to the default.
+        EMBED_LTO_BITCODE=1 ./test.sh --release --clean --release-sysroot --build-sysroot ${{ matrix.commands }} --features master
diff --git a/.github/workflows/stdarch.yml b/.github/workflows/stdarch.yml
index 28ac3cb6542..af6f399b52a 100644
--- a/.github/workflows/stdarch.yml
+++ b/.github/workflows/stdarch.yml
@@ -92,7 +92,8 @@ jobs:
     - name: Build
       run: |
         ./y.sh prepare --only-libcore
-        ./y.sh build --release --release-sysroot
+        # TODO: remove --features master when it is back to the default.
+        ./y.sh build --release --release-sysroot --features master
         cargo test
 
     - name: Clean
diff --git a/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch b/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
index 9520a5a39ed..914ae986b50 100644
--- a/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
+++ b/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
@@ -1,6 +1,6 @@
-From 7bcd24ec6d4a96121874cb1ae5a23ea274aeff34 Mon Sep 17 00:00:00 2001
+From a5663265f797a43c502915c356fe7899c16cee92 Mon Sep 17 00:00:00 2001
 From: None <none@example.com>
-Date: Thu, 19 Oct 2023 13:12:51 -0400
+Date: Sat, 18 Nov 2023 10:50:36 -0500
 Subject: [PATCH] [core] Disable portable-simd test
 
 ---
@@ -8,18 +8,18 @@ Subject: [PATCH] [core] Disable portable-simd test
  1 file changed, 2 deletions(-)
 
 diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
-index 5814ed4..194ad4c 100644
+index d0a119c..76fdece 100644
 --- a/library/core/tests/lib.rs
 +++ b/library/core/tests/lib.rs
-@@ -90,7 +90,6 @@
+@@ -89,7 +89,6 @@
+ #![feature(never_type)]
  #![feature(unwrap_infallible)]
- #![feature(pointer_byte_offsets)]
  #![feature(pointer_is_aligned)]
 -#![feature(portable_simd)]
  #![feature(ptr_metadata)]
  #![feature(lazy_cell)]
  #![feature(unsized_tuple_coercion)]
-@@ -157,7 +156,6 @@ mod pin;
+@@ -155,7 +154,6 @@ mod pin;
  mod pin_macro;
  mod ptr;
  mod result;
@@ -28,5 +28,5 @@ index 5814ed4..194ad4c 100644
  mod str;
  mod str_lossy;
 -- 
-2.42.0
+2.42.1
 
diff --git a/rust-toolchain b/rust-toolchain
index 205ec53b425..1962c217258 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2023-10-21"
+channel = "nightly-2023-11-17"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]