diff --git a/compiler/rustc_feature/src/accepted.rs b/compiler/rustc_feature/src/accepted.rs
index e3e4eefe5e10a..809d1630ddec1 100644
--- a/compiler/rustc_feature/src/accepted.rs
+++ b/compiler/rustc_feature/src/accepted.rs
@@ -96,7 +96,7 @@ declare_features! (
     /// Allows `#[cfg_attr(predicate, multiple, attributes, here)]`.
     (accepted, cfg_attr_multi, "1.33.0", Some(54881)),
     /// Allows the use of `#[cfg(<true/false>)]`.
-    (accepted, cfg_boolean_literals, "CURRENT_RUSTC_VERSION", Some(131204)),
+    (accepted, cfg_boolean_literals, "1.88.0", Some(131204)),
     /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests.
     (accepted, cfg_doctest, "1.40.0", Some(62210)),
     /// Enables `#[cfg(panic = "...")]` config key.
@@ -301,7 +301,7 @@ declare_features! (
     /// For example, you can write `Foo(a, ref b)` where `a` is by-move and `b` is by-ref.
     (accepted, move_ref_pattern, "1.49.0", Some(68354)),
     /// Allows using `#[naked]` on functions.
-    (accepted, naked_functions, "CURRENT_RUSTC_VERSION", Some(90957)),
+    (accepted, naked_functions, "1.88.0", Some(90957)),
     /// Allows specifying modifiers in the link attribute: `#[link(modifiers = "...")]`
     (accepted, native_link_modifiers, "1.61.0", Some(81490)),
     /// Allows specifying the bundle link modifier
diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs
index 402e18c5d1482..687d859df5359 100644
--- a/compiler/rustc_feature/src/removed.rs
+++ b/compiler/rustc_feature/src/removed.rs
@@ -143,7 +143,7 @@ declare_features! (
     (removed, infer_static_outlives_requirements, "1.63.0", Some(54185),
      Some("removed as it caused some confusion and discussion was inactive for years")),
     /// Allow anonymous constants from an inline `const` block in pattern position
-    (removed, inline_const_pat, "CURRENT_RUSTC_VERSION", Some(76001),
+    (removed, inline_const_pat, "1.88.0", Some(76001),
      Some("removed due to implementation concerns as it requires significant refactorings")),
     /// Lazily evaluate constants. This allows constants to depend on type parameters.
     (removed, lazy_normalization_consts, "1.46.0", Some(72219), Some("superseded by `generic_const_exprs`")),
diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs
index a5f89b7a076ae..8fb10736539a3 100644
--- a/compiler/rustc_feature/src/unstable.rs
+++ b/compiler/rustc_feature/src/unstable.rs
@@ -206,7 +206,7 @@ declare_features! (
     /// Allows access to the emscripten_wasm_eh config, used by panic_unwind and unwind
     (internal, cfg_emscripten_wasm_eh, "1.86.0", None),
     /// Allows checking whether or not the backend correctly supports unstable float types.
-    (internal, cfg_target_has_reliable_f16_f128, "CURRENT_RUSTC_VERSION", None),
+    (internal, cfg_target_has_reliable_f16_f128, "1.88.0", None),
     /// Allows identifying the `compiler_builtins` crate.
     (internal, compiler_builtins, "1.13.0", None),
     /// Allows writing custom MIR
@@ -316,7 +316,7 @@ declare_features! (
     // Unstable `#[target_feature]` directives.
     (unstable, aarch64_unstable_target_feature, "1.82.0", Some(44839)),
     (unstable, aarch64_ver_target_feature, "1.27.0", Some(44839)),
-    (unstable, apx_target_feature, "CURRENT_RUSTC_VERSION", Some(139284)),
+    (unstable, apx_target_feature, "1.88.0", Some(139284)),
     (unstable, arm_target_feature, "1.27.0", Some(44839)),
     (unstable, avx512_target_feature, "1.27.0", Some(44839)),
     (unstable, bpf_target_feature, "1.54.0", Some(44839)),
@@ -327,7 +327,7 @@ declare_features! (
     (unstable, loongarch_target_feature, "1.73.0", Some(44839)),
     (unstable, m68k_target_feature, "1.85.0", Some(134328)),
     (unstable, mips_target_feature, "1.27.0", Some(44839)),
-    (unstable, movrs_target_feature, "CURRENT_RUSTC_VERSION", Some(137976)),
+    (unstable, movrs_target_feature, "1.88.0", Some(137976)),
     (unstable, powerpc_target_feature, "1.27.0", Some(44839)),
     (unstable, prfchw_target_feature, "1.78.0", Some(44839)),
     (unstable, riscv_target_feature, "1.45.0", Some(44839)),
@@ -385,7 +385,7 @@ declare_features! (
     /// Allows associated type defaults.
     (unstable, associated_type_defaults, "1.2.0", Some(29661)),
     /// Allows implementing `AsyncDrop`.
-    (incomplete, async_drop, "CURRENT_RUSTC_VERSION", Some(126482)),
+    (incomplete, async_drop, "1.88.0", Some(126482)),
     /// Allows async functions to be called from `dyn Trait`.
     (incomplete, async_fn_in_dyn_trait, "1.85.0", Some(133119)),
     /// Allows `#[track_caller]` on async functions.
@@ -395,7 +395,7 @@ declare_features! (
     /// Allows `async` trait bound modifier.
     (unstable, async_trait_bounds, "1.85.0", Some(62290)),
     /// Allows using Intel AVX10 target features and intrinsics
-    (unstable, avx10_target_feature, "CURRENT_RUSTC_VERSION", Some(138843)),
+    (unstable, avx10_target_feature, "1.88.0", Some(138843)),
     /// Allows using C-variadics.
     (unstable, c_variadic, "1.34.0", Some(44930)),
     /// Allows the use of `#[cfg(contract_checks)` to check if contract checks are enabled.
@@ -483,11 +483,11 @@ declare_features! (
     /// Allows exhaustive pattern matching on types that contain uninhabited types.
     (unstable, exhaustive_patterns, "1.13.0", Some(51085)),
     /// Disallows `extern` without an explicit ABI.
-    (unstable, explicit_extern_abis, "CURRENT_RUSTC_VERSION", Some(134986)),
+    (unstable, explicit_extern_abis, "1.88.0", Some(134986)),
     /// Allows explicit tail calls via `become` expression.
     (incomplete, explicit_tail_calls, "1.72.0", Some(112788)),
     /// Allows using `#[export_stable]` which indicates that an item is exportable.
-    (incomplete, export_stable, "CURRENT_RUSTC_VERSION", Some(139939)),
+    (incomplete, export_stable, "1.88.0", Some(139939)),
     /// Allows using `aapcs`, `efiapi`, `sysv64` and `win64` as calling conventions
     /// for functions with varargs.
     (unstable, extended_varargs_abi_support, "1.65.0", Some(100189)),
@@ -512,7 +512,7 @@ declare_features! (
     /// Allows impls for the Freeze trait.
     (internal, freeze_impls, "1.78.0", Some(121675)),
     /// Frontmatter `---` blocks for use by external tools.
-    (unstable, frontmatter, "CURRENT_RUSTC_VERSION", Some(136889)),
+    (unstable, frontmatter, "1.88.0", Some(136889)),
     /// Allows defining gen blocks and `gen fn`.
     (unstable, gen_blocks, "1.75.0", Some(117078)),
     /// Infer generic args for both consts and types.
@@ -575,7 +575,7 @@ declare_features! (
     /// Allows `mut ref` and `mut ref mut` identifier patterns.
     (incomplete, mut_ref, "1.79.0", Some(123076)),
     /// Allows using `#[naked]` on `extern "Rust"` functions.
-    (unstable, naked_functions_rustic_abi, "CURRENT_RUSTC_VERSION", Some(138997)),
+    (unstable, naked_functions_rustic_abi, "1.88.0", Some(138997)),
     /// Allows using `#[target_feature(enable = "...")]` on `#[naked]` on functions.
     (unstable, naked_functions_target_feature, "1.86.0", Some(138568)),
     /// Allows specifying the as-needed link modifier
@@ -641,7 +641,7 @@ declare_features! (
     /// Allows string patterns to dereference values to match them.
     (unstable, string_deref_patterns, "1.67.0", Some(87121)),
     /// Allows `super let` statements.
-    (unstable, super_let, "CURRENT_RUSTC_VERSION", Some(139076)),
+    (unstable, super_let, "1.88.0", Some(139076)),
     /// Allows subtrait items to shadow supertrait items.
     (unstable, supertrait_item_shadowing, "1.86.0", Some(89151)),
     /// Allows using `#[thread_local]` on `static` items.
diff --git a/library/alloc/src/ffi/mod.rs b/library/alloc/src/ffi/mod.rs
index 05a2763a22596..1c408ace33613 100644
--- a/library/alloc/src/ffi/mod.rs
+++ b/library/alloc/src/ffi/mod.rs
@@ -87,5 +87,5 @@ pub use self::c_str::CString;
 #[stable(feature = "alloc_c_string", since = "1.64.0")]
 pub use self::c_str::{FromVecWithNulError, IntoStringError, NulError};
 
-#[stable(feature = "c_str_module", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "c_str_module", since = "1.88.0")]
 pub mod c_str;
diff --git a/library/core/src/arch.rs b/library/core/src/arch.rs
index f19fde2b4c733..e5078a45c6d9c 100644
--- a/library/core/src/arch.rs
+++ b/library/core/src/arch.rs
@@ -32,7 +32,7 @@ pub macro asm("assembly template", $(operands,)* $(options($(option),*))?) {
 ///
 /// [Rust By Example]: https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html
 /// [reference]: https://doc.rust-lang.org/nightly/reference/inline-assembly.html
-#[stable(feature = "naked_functions", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "naked_functions", since = "1.88.0")]
 #[rustc_builtin_macro]
 pub macro naked_asm("assembly template", $(operands,)* $(options($(option),*))?) {
     /* compiler built-in */
diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index c7657350a0d9a..ed523920e42b5 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -495,7 +495,7 @@ impl<T> Cell<T> {
     /// ```
     #[inline]
     #[stable(feature = "move_cell", since = "1.17.0")]
-    #[rustc_const_stable(feature = "const_cell", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_cell", since = "1.88.0")]
     #[rustc_confusables("swap")]
     pub const fn replace(&self, val: T) -> T {
         // SAFETY: This can cause data races if called from a separate thread,
@@ -537,7 +537,7 @@ impl<T: Copy> Cell<T> {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_cell", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_cell", since = "1.88.0")]
     pub const fn get(&self) -> T {
         // SAFETY: This can cause data races if called from a separate thread,
         // but `Cell` is `!Sync` so this won't happen.
@@ -556,7 +556,7 @@ impl<T: Copy> Cell<T> {
     /// assert_eq!(c.get(), 6);
     /// ```
     #[inline]
-    #[stable(feature = "cell_update", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "cell_update", since = "1.88.0")]
     pub fn update(&self, f: impl FnOnce(T) -> T) {
         let old = self.get();
         self.set(f(old));
@@ -608,7 +608,7 @@ impl<T: ?Sized> Cell<T> {
     /// ```
     #[inline]
     #[stable(feature = "cell_get_mut", since = "1.11.0")]
-    #[rustc_const_stable(feature = "const_cell", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_cell", since = "1.88.0")]
     pub const fn get_mut(&mut self) -> &mut T {
         self.value.get_mut()
     }
@@ -628,7 +628,7 @@ impl<T: ?Sized> Cell<T> {
     /// ```
     #[inline]
     #[stable(feature = "as_cell", since = "1.37.0")]
-    #[rustc_const_stable(feature = "const_cell", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_cell", since = "1.88.0")]
     pub const fn from_mut(t: &mut T) -> &Cell<T> {
         // SAFETY: `&mut` ensures unique access.
         unsafe { &*(t as *mut T as *const Cell<T>) }
@@ -686,7 +686,7 @@ impl<T> Cell<[T]> {
     /// assert_eq!(slice_cell.len(), 3);
     /// ```
     #[stable(feature = "as_cell", since = "1.37.0")]
-    #[rustc_const_stable(feature = "const_cell", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_cell", since = "1.88.0")]
     pub const fn as_slice_of_cells(&self) -> &[Cell<T>] {
         // SAFETY: `Cell<T>` has the same memory layout as `T`.
         unsafe { &*(self as *const Cell<[T]> as *const [Cell<T>]) }
diff --git a/library/core/src/ffi/mod.rs b/library/core/src/ffi/mod.rs
index c9c73a25d899e..288d0df0d05bb 100644
--- a/library/core/src/ffi/mod.rs
+++ b/library/core/src/ffi/mod.rs
@@ -20,7 +20,7 @@ pub use self::c_str::FromBytesUntilNulError;
 pub use self::c_str::FromBytesWithNulError;
 use crate::fmt;
 
-#[stable(feature = "c_str_module", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "c_str_module", since = "1.88.0")]
 pub mod c_str;
 
 #[unstable(
diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs
index cb83540c4eaf7..6eefb30468931 100644
--- a/library/core/src/hint.rs
+++ b/library/core/src/hint.rs
@@ -782,7 +782,7 @@ pub const fn cold_path() {
 /// # assert_eq!(bucket_one.len() + bucket_two.len(), 1);
 /// ```
 #[inline(always)]
-#[stable(feature = "select_unpredictable", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "select_unpredictable", since = "1.88.0")]
 pub fn select_unpredictable<T>(condition: bool, true_val: T, false_val: T) -> T {
     // FIXME(https://github.com/rust-lang/unsafe-code-guidelines/issues/245):
     // Change this to use ManuallyDrop instead.
diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs
index 5234fb83eb67c..35089b4853d7f 100644
--- a/library/core/src/ptr/const_ptr.rs
+++ b/library/core/src/ptr/const_ptr.rs
@@ -1741,7 +1741,7 @@ impl<T: ?Sized> PartialOrd for *const T {
     }
 }
 
-#[stable(feature = "raw_ptr_default", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "raw_ptr_default", since = "1.88.0")]
 impl<T: ?Sized + Thin> Default for *const T {
     /// Returns the default value of [`null()`][crate::ptr::null].
     fn default() -> Self {
diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs
index aa103af93ffcb..bd6c4daa509d9 100644
--- a/library/core/src/ptr/mod.rs
+++ b/library/core/src/ptr/mod.rs
@@ -1101,7 +1101,7 @@ pub const unsafe fn swap<T>(x: *mut T, y: *mut T) {
 /// ```
 #[inline]
 #[stable(feature = "swap_nonoverlapping", since = "1.27.0")]
-#[rustc_const_stable(feature = "const_swap_nonoverlapping", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_stable(feature = "const_swap_nonoverlapping", since = "1.88.0")]
 #[rustc_diagnostic_item = "ptr_swap_nonoverlapping"]
 #[rustc_allow_const_fn_unstable(const_eval_select)] // both implementations behave the same
 pub const unsafe fn swap_nonoverlapping<T>(x: *mut T, y: *mut T, count: usize) {
diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs
index 31b8d3b572c0b..9cf251742d427 100644
--- a/library/core/src/ptr/mut_ptr.rs
+++ b/library/core/src/ptr/mut_ptr.rs
@@ -1576,7 +1576,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// [`ptr::replace`]: crate::ptr::replace()
     #[stable(feature = "pointer_methods", since = "1.26.0")]
-    #[rustc_const_stable(feature = "const_inherent_ptr_replace", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_inherent_ptr_replace", since = "1.88.0")]
     #[inline(always)]
     pub const unsafe fn replace(self, src: T) -> T
     where
@@ -2159,7 +2159,7 @@ impl<T: ?Sized> PartialOrd for *mut T {
     }
 }
 
-#[stable(feature = "raw_ptr_default", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "raw_ptr_default", since = "1.88.0")]
 impl<T: ?Sized + Thin> Default for *mut T {
     /// Returns the default value of [`null_mut()`][crate::ptr::null_mut].
     fn default() -> Self {
diff --git a/library/core/src/ptr/non_null.rs b/library/core/src/ptr/non_null.rs
index 0864cc457b658..d05fb6a6d3199 100644
--- a/library/core/src/ptr/non_null.rs
+++ b/library/core/src/ptr/non_null.rs
@@ -1166,7 +1166,7 @@ impl<T: ?Sized> NonNull<T> {
     /// [`ptr::replace`]: crate::ptr::replace()
     #[inline(always)]
     #[stable(feature = "non_null_convenience", since = "1.80.0")]
-    #[rustc_const_stable(feature = "const_inherent_ptr_replace", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_inherent_ptr_replace", since = "1.88.0")]
     pub const unsafe fn replace(self, src: T) -> T
     where
         T: Sized,
diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
index 81fe0166fd77b..88b6674d4cccc 100644
--- a/library/core/src/slice/mod.rs
+++ b/library/core/src/slice/mod.rs
@@ -1303,8 +1303,8 @@ impl<T> [T] {
     /// // let chunks: &[[_; 5]] = slice.as_chunks_unchecked() // The slice length is not a multiple of 5
     /// // let chunks: &[[_; 0]] = slice.as_chunks_unchecked() // Zero-length chunks are never allowed
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[must_use]
     pub const unsafe fn as_chunks_unchecked<const N: usize>(&self) -> &[[T; N]] {
@@ -1360,8 +1360,8 @@ impl<T> [T] {
     /// };
     /// assert_eq!(chunks, &[['R', 'u'], ['s', 't']]);
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[track_caller]
     #[must_use]
@@ -1407,8 +1407,8 @@ impl<T> [T] {
     /// assert_eq!(remainder, &['l']);
     /// assert_eq!(chunks, &[['o', 'r'], ['e', 'm']]);
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[track_caller]
     #[must_use]
@@ -1498,8 +1498,8 @@ impl<T> [T] {
     /// // let chunks: &[[_; 5]] = slice.as_chunks_unchecked_mut() // The slice length is not a multiple of 5
     /// // let chunks: &[[_; 0]] = slice.as_chunks_unchecked_mut() // Zero-length chunks are never allowed
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[must_use]
     pub const unsafe fn as_chunks_unchecked_mut<const N: usize>(&mut self) -> &mut [[T; N]] {
@@ -1551,8 +1551,8 @@ impl<T> [T] {
     /// }
     /// assert_eq!(v, &[1, 1, 2, 2, 9]);
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[track_caller]
     #[must_use]
@@ -1604,8 +1604,8 @@ impl<T> [T] {
     /// }
     /// assert_eq!(v, &[9, 1, 1, 2, 2]);
     /// ```
-    #[stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "slice_as_chunks", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "slice_as_chunks", since = "1.88.0")]
+    #[rustc_const_stable(feature = "slice_as_chunks", since = "1.88.0")]
     #[inline]
     #[track_caller]
     #[must_use]
diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
index 79e9b8430b8d5..b4fd20c0c176a 100644
--- a/library/proc_macro/src/lib.rs
+++ b/library/proc_macro/src/lib.rs
@@ -513,13 +513,13 @@ impl Span {
     }
 
     /// Creates an empty span pointing to directly before this span.
-    #[stable(feature = "proc_macro_span_location", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_location", since = "1.88.0")]
     pub fn start(&self) -> Span {
         Span(self.0.start())
     }
 
     /// Creates an empty span pointing to directly after this span.
-    #[stable(feature = "proc_macro_span_location", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_location", since = "1.88.0")]
     pub fn end(&self) -> Span {
         Span(self.0.end())
     }
@@ -527,7 +527,7 @@ impl Span {
     /// The one-indexed line of the source file where the span starts.
     ///
     /// To obtain the line of the span's end, use `span.end().line()`.
-    #[stable(feature = "proc_macro_span_location", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_location", since = "1.88.0")]
     pub fn line(&self) -> usize {
         self.0.line()
     }
@@ -535,7 +535,7 @@ impl Span {
     /// The one-indexed column of the source file where the span starts.
     ///
     /// To obtain the column of the span's end, use `span.end().column()`.
-    #[stable(feature = "proc_macro_span_location", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_location", since = "1.88.0")]
     pub fn column(&self) -> usize {
         self.0.column()
     }
@@ -544,7 +544,7 @@ impl Span {
     ///
     /// This might not correspond to a valid file system path.
     /// It might be remapped (e.g. `"/src/lib.rs"`) or an artificial path (e.g. `"<command line>"`).
-    #[stable(feature = "proc_macro_span_file", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_file", since = "1.88.0")]
     pub fn file(&self) -> String {
         self.0.file()
     }
@@ -554,7 +554,7 @@ impl Span {
     /// This is the actual path on disk. It is unaffected by path remapping.
     ///
     /// This path should not be embedded in the output of the macro; prefer `file()` instead.
-    #[stable(feature = "proc_macro_span_file", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "proc_macro_span_file", since = "1.88.0")]
     pub fn local_file(&self) -> Option<PathBuf> {
         self.0.local_file().map(|s| PathBuf::from(s))
     }
diff --git a/library/std/src/collections/hash/map.rs b/library/std/src/collections/hash/map.rs
index 961d6ee0665c1..3530f890f5294 100644
--- a/library/std/src/collections/hash/map.rs
+++ b/library/std/src/collections/hash/map.rs
@@ -683,7 +683,7 @@ impl<K, V, S> HashMap<K, V, S> {
     /// ```
     #[inline]
     #[rustc_lint_query_instability]
-    #[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "hash_extract_if", since = "1.88.0")]
     pub fn extract_if<F>(&mut self, pred: F) -> ExtractIf<'_, K, V, F>
     where
         F: FnMut(&K, &mut V) -> bool,
@@ -1680,7 +1680,7 @@ impl<'a, K, V> Drain<'a, K, V> {
 /// ]);
 /// let iter = map.extract_if(|_k, v| *v % 2 == 0);
 /// ```
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 #[must_use = "iterators are lazy and do nothing unless consumed"]
 pub struct ExtractIf<'a, K, V, F> {
     base: base::ExtractIf<'a, K, V, F>,
@@ -2294,7 +2294,7 @@ where
     }
 }
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, V, F> Iterator for ExtractIf<'_, K, V, F>
 where
     F: FnMut(&K, &mut V) -> bool,
@@ -2311,10 +2311,10 @@ where
     }
 }
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, V, F> FusedIterator for ExtractIf<'_, K, V, F> where F: FnMut(&K, &mut V) -> bool {}
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, V, F> fmt::Debug for ExtractIf<'_, K, V, F>
 where
     K: fmt::Debug,
diff --git a/library/std/src/collections/hash/set.rs b/library/std/src/collections/hash/set.rs
index fa2f4f0a58fec..8514dfd9a984d 100644
--- a/library/std/src/collections/hash/set.rs
+++ b/library/std/src/collections/hash/set.rs
@@ -308,7 +308,7 @@ impl<T, S> HashSet<T, S> {
     /// ```
     #[inline]
     #[rustc_lint_query_instability]
-    #[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "hash_extract_if", since = "1.88.0")]
     pub fn extract_if<F>(&mut self, pred: F) -> ExtractIf<'_, T, F>
     where
         F: FnMut(&T) -> bool,
@@ -1390,7 +1390,7 @@ pub struct Drain<'a, K: 'a> {
 ///
 /// let mut extract_ifed = a.extract_if(|v| v % 2 == 0);
 /// ```
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 pub struct ExtractIf<'a, K, F> {
     base: base::ExtractIf<'a, K, F>,
 }
@@ -1670,7 +1670,7 @@ impl<K: fmt::Debug> fmt::Debug for Drain<'_, K> {
     }
 }
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, F> Iterator for ExtractIf<'_, K, F>
 where
     F: FnMut(&K) -> bool,
@@ -1687,10 +1687,10 @@ where
     }
 }
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, F> FusedIterator for ExtractIf<'_, K, F> where F: FnMut(&K) -> bool {}
 
-#[stable(feature = "hash_extract_if", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "hash_extract_if", since = "1.88.0")]
 impl<K, F> fmt::Debug for ExtractIf<'_, K, F>
 where
     K: fmt::Debug,
diff --git a/library/std/src/ffi/mod.rs b/library/std/src/ffi/mod.rs
index bd9446f5aba51..567916099101b 100644
--- a/library/std/src/ffi/mod.rs
+++ b/library/std/src/ffi/mod.rs
@@ -161,7 +161,7 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-#[stable(feature = "c_str_module", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "c_str_module", since = "1.88.0")]
 pub mod c_str;
 
 #[stable(feature = "core_c_void", since = "1.30.0")]
diff --git a/src/ci/channel b/src/ci/channel
index bf867e0ae5b6c..65b2df87f7df3 100644
--- a/src/ci/channel
+++ b/src/ci/channel
@@ -1 +1 @@
-nightly
+beta
diff --git a/src/doc/rustdoc/src/write-documentation/documentation-tests.md b/src/doc/rustdoc/src/write-documentation/documentation-tests.md
index 077b02d603d0f..e6b15e0dbd325 100644
--- a/src/doc/rustdoc/src/write-documentation/documentation-tests.md
+++ b/src/doc/rustdoc/src/write-documentation/documentation-tests.md
@@ -462,7 +462,7 @@ struct Foo;
 ```
 
 In older versions, this will be ignored on all targets, but starting with
-version CURRENT_RUSTC_VERSION, `ignore-x86_64` will override `ignore`.
+version 1.88.0, `ignore-x86_64` will override `ignore`.
 
 ### Custom CSS classes for code blocks