diff --git a/Cargo.lock b/Cargo.lock
index 1369cc5..3ffac6c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -65,8 +65,8 @@ dependencies = [
  "jemallocator 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libm 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "mac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "modtype 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "nalgebra 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ndarray 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -260,7 +260,7 @@ dependencies = [
  "bitmaps 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xoshiro 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "sized-chunks 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sized-chunks 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -351,13 +351,13 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "mac"
-version = "0.1.1"
+name = "maplit"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "maplit"
-version = "1.0.2"
+name = "matches"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -906,7 +906,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "sized-chunks"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitmaps 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1084,8 +1084,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)" = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
 "checksum libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
 "checksum libm 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c7d73b3f436185384286bd8098d17ec07c9a7d2388a6599f824d8502b529702a"
-"checksum mac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 "checksum maplit 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
+"checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 "checksum matrixmultiply 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f7ec66360130972f34830bfad9ef05c6610a43938a467bcc9ab9369ab3478f"
 "checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
 "checksum memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88579771288728879b57485cc7d6b07d648c9f0141eb955f8ab7f9d45394468e"
@@ -1148,7 +1148,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-"checksum sized-chunks 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "62db64dd92b3b54314b1e216c274634ca2b3fe8da8b3873be670cb1ac4dad30f"
+"checksum sized-chunks 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6f59f81ec9833a580d2448e958d16bd872637798f3ab300b693c48f136fb76ff"
 "checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
 "checksum smallvec 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ecf3b85f68e8abaa7555aa5abdb1153079387e60b718283d732f03897fcfc86"
 "checksum static_assertions 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7f3eb36b47e512f8f1c9e3d10c2c1965bc992bd9cdb024fa581e2194501c83d3"
diff --git a/Cargo.toml b/Cargo.toml
index 5ca8954..47ffae8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -106,8 +106,8 @@ take_mut = "=0.2.2"
 # 1行で書ける`macro_rules`
 defmac = "=0.2.1"
 
-# シンプルなマクロの詰め合せ
-mac = "=0.1.1"
+# パターンを`bool`式に
+matches = "=0.1.8"
 
 # `if`と`if let`を『まとめる』マクロ`if_chain!`
 if_chain = "=1.0.0"
diff --git a/examples/apg4b-a.rs b/examples/apg4b-a.rs
index 7eaf969..ef23780 100644
--- a/examples/apg4b-a.rs
+++ b/examples/apg4b-a.rs
@@ -17,8 +17,9 @@ use itertools as _;
 use itertools_num as _;
 use lazy_static as _;
 use libm as _;
-use mac as _;
 use maplit as _;
+#[allow(unused_imports)]
+use matches::matches as _; // https://github.com/rust-lang/rust/issues/66518
 use modtype as _;
 use nalgebra as _;
 use ndarray as _;