diff --git a/src/setup/core.rs b/src/setup/core.rs
index e9e8a26..4b911a1 100644
--- a/src/setup/core.rs
+++ b/src/setup/core.rs
@@ -1,6 +1,6 @@
 use super::runnable::Runnable;
 use super::setup::Setup;
-use super::util::{AddableResource, InternalAddResult};
+use super::util::{AddResult, AddableResource};
 use super::SymbolRunner;
 use crate::async_utils::join;
 use crate::resources::{FromArtifact, FromResource};
@@ -17,7 +17,7 @@ use std::rc::Rc;
 
 #[async_trait(?Send)]
 pub trait AddGeneric<X: ToArtifact> {
-  async fn add_generic(&self, logger: &Rc<Logger>, x: X) -> InternalAddResult<X>;
+  async fn add_generic(&self, logger: &Rc<Logger>, x: X) -> AddResult<X>;
 }
 
 macro_rules! add_generic {
@@ -35,7 +35,7 @@ macro_rules! add_generic {
       ),*
     {
       #[allow(unused, clippy::shadow_unrelated)]
-      async fn add_generic(&self, logger: &Rc<Logger>, ($($name,)*): ($($name,)*)) -> Result<(($($name::Artifact,)*), bool), Box<dyn Error>>
+      async fn add_generic(&self, logger: &Rc<Logger>, ($($name,)*): ($($name,)*)) -> AddResult<($($name,)*)>
       {
         let ($($name,)*) = join!($(self.add(logger, $name, false),)*);
         let mut did_run_any = false;
@@ -72,7 +72,7 @@ where
   // because the prerequisites are Option<T>, too, and thus this would
   // require AddGeneric<Option<T>> to already be implemented
 {
-  async fn add_generic(&self, logger: &Rc<Logger>, r: Option<T>) -> InternalAddResult<Option<T>> {
+  async fn add_generic(&self, logger: &Rc<Logger>, r: Option<T>) -> AddResult<Option<T>> {
     Ok(match r {
       Some(r) => {
         let (result, did_run) = self.add(logger, r, false).await?;
@@ -96,20 +96,20 @@ where
   T::Artifact: Clone,
   RegularSetupCore<SR, L, B>: 'static + SetupCore<T, Self>,
 {
-  async fn add_generic(&self, logger: &Rc<Logger>, r: T) -> InternalAddResult<T> {
+  async fn add_generic(&self, logger: &Rc<Logger>, r: T) -> AddResult<T> {
     self.add(logger, r, false).await
   }
 }
 
 #[async_trait(?Send)]
 pub trait SetupCore<R: AddableResource, S> {
-  async fn add<RR: AsRef<R>>(
+  async fn add(
     &self,
     setup: &S,
     logger: &Rc<Logger>,
-    resource: RR,
+    resource: impl AsRef<R>,
     force_run: bool,
-  ) -> InternalAddResult<R>;
+  ) -> AddResult<R>;
 }
 
 #[derive(Debug)]
@@ -135,13 +135,13 @@ where
   L: ResourceLocator<R>,
   S: AddGeneric<B::Prerequisites> + AddGeneric<<L as ResourceLocator<R>>::Prerequisites>,
 {
-  async fn add<RR: AsRef<R>>(
+  async fn add(
     &self,
     setup: &S,
     logger: &Rc<Logger>,
-    resource: RR,
+    resource: impl AsRef<R>,
     force_run: bool,
-  ) -> InternalAddResult<R> {
+  ) -> AddResult<R> {
     let resource = resource.as_ref();
     let logger = Rc::new(logger.new(o!("resource" => format!("{resource:?}"))));
     trace!(logger, "(force_run is {})", force_run);
diff --git a/src/setup/setup.rs b/src/setup/setup.rs
index 7536146..976d17e 100644
--- a/src/setup/setup.rs
+++ b/src/setup/setup.rs
@@ -1,5 +1,5 @@
 use super::core::{RegularSetupCore, SetupCore};
-use super::util::{AddResult, AddableResource, InternalAddResult, Recorder};
+use super::util::{AddResult, AddableResource, Recorder};
 use super::SymbolRunner;
 use crate::async_utils::sleep;
 use crate::loggers::Logger;
@@ -8,7 +8,7 @@ use crate::symbols::Symbol;
 use crate::{DefaultBuilder, DefaultLocator};
 use futures_util::future::{FutureExt, Shared};
 use slog::{o, trace, Logger as SlogLogger};
-use std::cell::{RefCell, RefMut};
+use std::cell::RefCell;
 use std::collections::HashMap;
 use std::error::Error;
 use std::fmt::Debug;
@@ -40,10 +40,6 @@ impl<SR, L, B, Rs, As> Setup<SR, L, B, Rs, As> {
 impl<L: 'static, B: 'static, SR: 'static, Rs: Hash + Eq + 'static, As: 'static>
   Setup<SR, L, B, Rs, As>
 {
-  fn borrow_resources(&self) -> RefMut<'_, Cache<Rs, As>> {
-    self.0.resources.borrow_mut()
-  }
-
   // FIXME: https://github.com/rust-lang/rust-clippy/issues/6353
   #[allow(clippy::await_holding_refcell_ref)]
   pub async fn add<R: AddableResource>(
@@ -51,15 +47,14 @@ impl<L: 'static, B: 'static, SR: 'static, Rs: Hash + Eq + 'static, As: 'static>
     logger: &Rc<SlogLogger>,
     resource: R,
     force_run: bool,
-  ) -> InternalAddResult<R>
+  ) -> AddResult<R>
   where
     Rs: FromResource<R>,
     As: FromArtifact<R> + Clone,
-    R::Artifact: Clone,
     RegularSetupCore<SR, L, B>: SetupCore<R, Self>,
   {
     let (storable_resource, weak_resource) = Rs::from_resource(resource);
-    let mut resources = self.borrow_resources();
+    let mut resources = self.0.resources.borrow_mut();
     let result = if let Some(future) = resources.remove(&storable_resource) {
       assert!(
         !force_run,
@@ -140,7 +135,6 @@ impl<
   where
     Rs: FromResource<R>,
     As: FromArtifact<R> + Clone,
-    R::Artifact: Clone,
     RegularSetupCore<SR, L, B>: SetupCore<R, Setup<SR, L, B, Rs, As>>,
   {
     let recorder = Recorder::default();
@@ -151,13 +145,13 @@ impl<
     self.log_result(recorder, result.as_ref().map(|(_, did_run)| *did_run));
     result
   }
+
   pub async fn add<R: AddableResource>(&self, resource: R) -> AddResult<R>
   where
-    RegularSetupCore<SR, L, B>: SetupCore<R, Setup<SR, L, B, Rs, As>>,
     Rs: FromResource<R>,
     As: FromArtifact<R> + Clone,
     R::Artifact: Clone,
-    SR: SymbolRunner,
+    RegularSetupCore<SR, L, B>: SetupCore<R, Setup<SR, L, B, Rs, As>>,
   {
     self.add_force(resource, false).await
   }
diff --git a/src/setup/util.rs b/src/setup/util.rs
index 402adc2..4602f2d 100644
--- a/src/setup/util.rs
+++ b/src/setup/util.rs
@@ -13,7 +13,6 @@ pub trait AddableResource: 'static + Resource + Debug {}
 impl<R> AddableResource for R where R: 'static + Resource + Debug {}
 
 pub type AddResult<R> = Result<(<R as ToArtifact>::Artifact, bool), Box<dyn Error>>;
-pub type InternalAddResult<R> = Result<(<R as ToArtifact>::Artifact, bool), Box<dyn Error>>;
 
 // From https://users.rust-lang.org/t/how-to-send-a-writer-into-a-thread/4965/10
 #[derive(Clone)]