diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7b30b89..f68f312 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,10 @@ env:
   RUSTFLAGS: -Dwarnings
   RUST_BACKTRACE: 1
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-latest
diff --git a/build.rs b/build.rs
index b60351a..12a5212 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,7 @@
 fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rustc-check-cfg=cfg(slab_no_const_vec_new,slab_no_track_caller)");
+
     let cfg = match autocfg::AutoCfg::new() {
         Ok(cfg) => cfg,
         Err(e) => {
diff --git a/src/lib.rs b/src/lib.rs
index 8abec35..8317c5f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,7 @@
     no_crate_inject,
     attr(deny(warnings, rust_2018_idioms), allow(dead_code, unused_variables))
 ))]
+#![allow(clippy::incompatible_msrv)] // false positive: https://github.com/rust-lang/rust-clippy/issues/12280
 
 //! Pre-allocated storage for a uniform data type.
 //!