diff --git a/tools/calyx-ffi/src/backend/cider.rs b/tools/calyx-ffi/src/backend/cider.rs
index 53a930858a..9f7e3438db 100644
--- a/tools/calyx-ffi/src/backend/cider.rs
+++ b/tools/calyx-ffi/src/backend/cider.rs
@@ -1,5 +1,4 @@
 use calyx_ir::Context;
-use core::panic;
 use interp::{
     flatten::{
         flat_ir,
@@ -16,7 +15,8 @@ pub struct CiderFFIBackend {
 }
 
 impl CiderFFIBackend {
-    pub fn from(ctx: &Context, name: &'static str) -> Self {
+    pub fn from(ctx: &Context, _name: &'static str) -> Self {
+        // TODO(ethan, maybe griffin): use _name to select the component somehow
         let ctx = flat_ir::translate(ctx);
         let simulator = Simulator::build_simulator(Rc::new(ctx), &None)
             .expect("we live on the edge");
diff --git a/tools/calyx-ffi/src/lib.rs b/tools/calyx-ffi/src/lib.rs
index ccecc28b48..b4644d545a 100644
--- a/tools/calyx-ffi/src/lib.rs
+++ b/tools/calyx-ffi/src/lib.rs
@@ -55,7 +55,7 @@ impl CalyxFFI {
     pub fn new_comp<T: CalyxFFIComponent + Default>(
         &mut self,
     ) -> CalyxFFIComponentRef {
-        let mut comp = unsafe { T::default() };
+        let mut comp = T::default();
         let path = comp.path();
         let context = self.contexts.entry(path).or_insert_with_key(|path| {
             // there has to be a better way to find lib
diff --git a/tools/tb/examples/calyx/test.rs b/tools/tb/examples/calyx/test.rs
index f70fcdec5c..b0a9135ddc 100644
--- a/tools/tb/examples/calyx/test.rs
+++ b/tools/tb/examples/calyx/test.rs
@@ -9,7 +9,7 @@ declare_calyx_interface! {
 }
 
 #[calyx_ffi(
-    src = "/Users/ethan/Documents/GitHub/calyx/tools/tb/examples/calyx/adder.futil",
+    src = "/home/runner/work/calyx/calyx/tools/tb/examples/calyx/adder.futil",
     comp = "main",
     backend = cider_ffi_backend,
     derive = [
@@ -19,7 +19,7 @@ declare_calyx_interface! {
 struct Adder;
 
 #[calyx_ffi(
-    src = "/Users/ethan/Documents/GitHub/calyx/tools/tb/examples/calyx/subber.futil",
+    src = "/home/runner/work/calyx/calyx/tools/tb/examples/calyx/subber.futil",
     comp = "main",
     backend = cider_ffi_backend,
     derive = [
diff --git a/tools/tb/src/driver.rs b/tools/tb/src/driver.rs
index 4e72be9a0b..9859003986 100644
--- a/tools/tb/src/driver.rs
+++ b/tools/tb/src/driver.rs
@@ -1,6 +1,6 @@
 use std::{
     collections::HashMap,
-    fs, io,
+    io,
     path::{Path, PathBuf},
 };