diff --git a/.cargo/config b/.cargo/config
deleted file mode 100644
index 401c3ce..0000000
--- a/.cargo/config
+++ /dev/null
@@ -1,5 +0,0 @@
-[source.crates-io]
-replace-with = 'tuna'
-
-[source.tuna]
-registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"
diff --git a/.pam_environment b/.pam_environment
index 080a645..120bc39 100644
--- a/.pam_environment
+++ b/.pam_environment
@@ -42,6 +42,7 @@ HISTFILE	DEFAULT=${XDG_DATA_HOME}/zsh/history
 RANDFILE	DEFAULT=${XDG_DATA_HOME}/openssl/randfile
 
 # rust
+CARGO_HOME	DEFAULT=${XDG_DATA_HOME}/cargo
 RUSTUP_HOME	DEFAULT=${XDG_DATA_HOME}/rustup
 
 # golang