diff --git a/pkgs/development/libraries/libimagequant/Cargo.lock b/pkgs/development/libraries/libimagequant/Cargo.lock
index e98ae261a70..d85dfcde626 100644
--- a/pkgs/development/libraries/libimagequant/Cargo.lock
+++ b/pkgs/development/libraries/libimagequant/Cargo.lock
@@ -74,9 +74,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.7"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf2b3e8478797446514c91ef04bafcb59faba183e621ad488df88983cc14128c"
+checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
 dependencies = [
  "cfg-if",
  "crossbeam-utils",
@@ -132,9 +132,9 @@ dependencies = [
 
 [[package]]
 name = "flate2"
-version = "1.0.25"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8a2db397cb1c8772f31494cb8917e48cd1e64f0fa7efac59fbd741a0a8ce841"
+checksum = "3b9429470923de8e8cbd4d2dc513535400b4b3fef0319fb5c4e1f520a7bef743"
 dependencies = [
  "crc32fast",
  "miniz_oxide",
@@ -160,11 +160,10 @@ dependencies = [
 
 [[package]]
 name = "imagequant"
-version = "4.1.1"
+version = "4.2.0"
 dependencies = [
  "arrayvec",
  "lodepng",
- "noisy_float",
  "num_cpus",
  "once_cell",
  "rayon",
@@ -183,9 +182,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.140"
+version = "0.2.142"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+checksum = "6a987beff54b60ffa6d51982e1aa1146bc42f19bd26be28b0586f252fccf5317"
 
 [[package]]
 name = "lodepng"
@@ -211,31 +210,13 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide"
-version = "0.6.2"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b275950c28b37e794e8c55d88aeb5e139d0ce23fdbbeda68f8d7174abdf9e8fa"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
 dependencies = [
  "adler",
 ]
 
-[[package]]
-name = "noisy_float"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "978fe6e6ebc0bf53de533cd456ca2d9de13de13856eda1518a285d7705a213af"
-dependencies = [
- "num-traits",
-]
-
-[[package]]
-name = "num-traits"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "num_cpus"
 version = "1.15.0"
diff --git a/pkgs/development/libraries/libimagequant/default.nix b/pkgs/development/libraries/libimagequant/default.nix
index 43e4b447ae7..08893611507 100644
--- a/pkgs/development/libraries/libimagequant/default.nix
+++ b/pkgs/development/libraries/libimagequant/default.nix
@@ -5,13 +5,13 @@ let
 in
 rustPlatform.buildRustPackage rec {
   pname = "libimagequant";
-  version = "4.1.1";
+  version = "4.2.0";
 
   src = fetchFromGitHub {
     owner = "ImageOptim";
     repo = pname;
     rev = version;
-    hash = "sha256-sCxscs4D2p7LNDpcrKfAc315/NbxbQXtsyc33zUmccM=";
+    hash = "sha256-51xTCymZKLuw1Xeje6EyKqHdbmqBV1Fdhx+OsO3bZ6Q=";
   };
 
   cargoLock = {
@@ -19,11 +19,9 @@ rustPlatform.buildRustPackage rec {
   };
 
   postPatch = ''
-    cp ${./Cargo.lock} Cargo.lock
+    ln -s ${./Cargo.lock} Cargo.lock
   '';
 
-  cargoHash = "sha256-0HOmItooNsGq6iTIb9M5IPXMwYh2nQ03qfjomkg0d00=";
-
   nativeBuildInputs = [ cargo-c ];
 
   postBuild = ''