diff --git a/pkgs/development/tools/rust/cargo-guppy/default.nix b/pkgs/development/tools/rust/cargo-guppy/default.nix
index a79f03c2859f..f1e066f1b9c0 100644
--- a/pkgs/development/tools/rust/cargo-guppy/default.nix
+++ b/pkgs/development/tools/rust/cargo-guppy/default.nix
@@ -9,16 +9,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-guppy";
-  version = "unstable-2023-06-19";
+  version = "unstable-2023-06-26";
 
   src = fetchFromGitHub {
     owner = "guppy-rs";
     repo = "guppy";
-    rev = "23b1c804cb4a6d9d38d093ca3400e90805d4c36c";
-    sha256 = "sha256-cKnu28L8tjndjtHuClLIpiwTzf6YoN37vw1sE7xrNzQ=";
+    rev = "c05b95997a127cebef76d3b238e0341086e59e32";
+    sha256 = "sha256-CQ0bpc5pmPMQMQ+8mcrUwo19zqyfkk5pE/lWRr9azXs=";
   };
 
-  cargoSha256 = "sha256-fCIBv8FOUBPzf7I7CdVBDvbHVyuNQRURxNQ7B7cgoKE=";
+  cargoSha256 = "sha256-OHtg3za8EyQVYQ6XQzLK7UgvGSl8ObfeKURFL6vBDnE=";
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/development/tools/rust/cargo-hakari/default.nix b/pkgs/development/tools/rust/cargo-hakari/default.nix
index f5c9a96b496b..06c1fd6016f4 100644
--- a/pkgs/development/tools/rust/cargo-hakari/default.nix
+++ b/pkgs/development/tools/rust/cargo-hakari/default.nix
@@ -2,16 +2,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-hakari";
-  version = "0.9.25";
+  version = "0.9.26";
 
   src = fetchFromGitHub {
     owner = "guppy-rs";
     repo = "guppy";
     rev = "cargo-hakari-${version}";
-    sha256 = "sha256-cKnu28L8tjndjtHuClLIpiwTzf6YoN37vw1sE7xrNzQ=";
+    sha256 = "sha256-CQ0bpc5pmPMQMQ+8mcrUwo19zqyfkk5pE/lWRr9azXs=";
   };
 
-  cargoHash = "sha256-PoTwS9oS8Nmkdp3ZvdZRdk028SIx6D7kfsiRksyTpKo=";
+  cargoHash = "sha256-F6+GRn3l849vRVKE1KhLMnxwR5NWu1b78xTxrHi817A=";
 
   cargoBuildFlags = [ "-p" "cargo-hakari" ];
   cargoTestFlags = [ "-p" "cargo-hakari" ];