Docker build with the shell set to a relative path so it works

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/server_shell.rs b/tests/server_shell.rs
index bf3e1d6..4c4587b 100644
--- a/tests/server_shell.rs
+++ b/tests/server_shell.rs
@@ -11,12 +11,15 @@ struct TestContext {
 
 fn build_docker_image() -> Result<()> {
     let mut command = std::process::Command::new("docker");
+
+    let absolute_shell_path = cargo_bin(env!("CARGO_PKG_NAME"));
+    let relative_shell_path = absolute_shell_path.strip_prefix(std::fs::canonicalize(".")?)?;
     command.args([
         "build",
         "-t",
         "shackle-server",
         "--build-arg",
-        &format!("SHELL={}", cargo_bin(env!("CARGO_PKG_NAME")).display()),
+        &format!("SHELL={}", relative_shell_path.display()),
         "./",
     ]);