diff --git a/Cargo.lock b/Cargo.lock
index 4342c17a..118d31ed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -147,7 +147,6 @@ dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -615,11 +614,6 @@ dependencies = [
  "unicode-segmentation 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "strsim"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "syn"
 version = "0.15.44"
@@ -855,7 +849,6 @@ dependencies = [
 "checksum serde_json 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)" = "9371ade75d4c2d6cb154141b9752cf3781ec9c05e0e5cf35060e1e70ee7b9c25"
 "checksum shaman 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3b1a48b7e97a07b8f5771159e6914d8459557f8f833a60c4bd041f03736844f5"
 "checksum strcursor 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "a53cb721e1f6d0dbba1296e2d7770edbec9a4888fdd8f6a22fea97a0a69b465a"
-"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 "checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
 "checksum syn 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "158521e6f544e7e3dcfc370ac180794aa38cb34a1b1e07609376d4adcf429b93"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
diff --git a/src/error.rs b/src/error.rs
index 0e3aa855..c921858d 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -78,18 +78,7 @@ impl fmt::Display for MainError {
     }
 }
 
-impl Error for MainError {
-    fn description(&self) -> &str {
-        use self::MainError::*;
-        match *self {
-            Io(_, ref err) => err.description(),
-            Tag(_, ref msg, _) => msg,
-            Other(_, ref err) => err.description(),
-            OtherOwned(_, ref err) => err,
-            OtherBorrowed(_, ref err) => err,
-        }
-    }
-}
+impl Error for MainError {}
 
 macro_rules! from_impl {
     ($src_ty:ty => $dst_ty:ty, $src:ident -> $e:expr) => {
diff --git a/src/main.rs b/src/main.rs
index 4c8eaa3a..c3aa19b4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -44,7 +44,6 @@ mod util;
 #[cfg(windows)]
 mod file_assoc;
 
-use std::error::Error;
 use std::ffi::OsString;
 use std::fs;
 use std::io::{Read, Write};
@@ -456,7 +455,7 @@ fn clean_cache(max_age: u128) -> Result<()> {
             };
             info!("meta_mtime: {:>20?} ms", meta_mtime);
 
-            (meta_mtime <= cutoff)
+            meta_mtime <= cutoff
         };
 
         if remove_dir() {
@@ -826,7 +825,7 @@ fn decide_action_for(
         Ok(meta) => meta,
         Err(err) => {
             info!("recompiling because: failed to load metadata");
-            debug!("get_pkg_metadata error: {}", err.description());
+            debug!("get_pkg_metadata error: {}", err);
             bail!(compile: true)
         }
     };