diff --git a/Cargo.toml b/Cargo.toml
index f52fc98..25820d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "safex11"
-version = "0.0.6"
+version = "0.0.5"
 description = "Safe, high-level x11 bindings"
 license-file = "LICENSE"
 authors = ["Michael Zhang <mail@mzhang.io>"]
diff --git a/flake.nix b/flake.nix
index c2975e3..f2c348c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,6 +23,7 @@
             cargo-deny
             cargo-edit
             cargo-expand
+            cargo-release
 
             pkg-config
             xlibsWrapper