diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1bd5da4b..bef9814b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,17 +22,14 @@ jobs:
     strategy:
       matrix:
         include:
-          ## permission denied?
-          # - target: armv7-unknown-linux-gnueabihf
-          #   os: ubuntu-latest
-          # - target: aarch64-unknown-linux-gnu
-          #   os: ubuntu-latest
+          - target: armv7-unknown-linux-gnueabihf
+            os: ubuntu-latest
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-latest
           - target: aarch64-apple-darwin
             os: macos-latest
           - target: x86_64-unknown-linux-gnu
             os: ubuntu-latest
-          # - target: x86_64-unknown-linux-musl
-          #   os: ubuntu-latest
           - target: x86_64-apple-darwin
             os: macos-latest
           - target: x86_64-pc-windows-msvc
diff --git a/Cross.toml b/Cross.toml
new file mode 100644
index 00000000..ace72eb8
--- /dev/null
+++ b/Cross.toml
@@ -0,0 +1,4 @@
+[target.aarch64-unknown-linux-gnu]
+pre-build = ["apt-get update && apt-get install --assume-yes python3"]
+[target.armv7-unknown-linux-gnueabihf]
+pre-build = ["apt-get update && apt-get install --assume-yes python3"]
diff --git a/crates/erg_common/python_util.rs b/crates/erg_common/python_util.rs
index 4005caa3..c218d396 100644
--- a/crates/erg_common/python_util.rs
+++ b/crates/erg_common/python_util.rs
@@ -3,6 +3,7 @@
 //! CPythonを呼び出すためのユーティリティー
 use std::process::Command;
 
+use crate::fn_name_full;
 use crate::serialize::get_magic_num_from_bytes;
 
 #[cfg(unix)]
@@ -535,11 +536,11 @@ pub fn which_python() -> String {
     let out = Command::new(cmd)
         .arg(python)
         .output()
-        .expect("python not found");
+        .unwrap_or_else(|_| panic!("{}: {python} not found", fn_name_full!()));
     let res = String::from_utf8(out.stdout).unwrap();
     let res = res.split('\n').next().unwrap_or("").replace('\r', "");
     if res.is_empty() {
-        println!("python not found");
+        println!("{}: {python} not found", fn_name_full!());
         std::process::exit(1);
     } else if res.contains("pyenv") && cfg!(windows) {
         println!("cannot use pyenv-win"); // because pyenv-win does not support `-c` option