diff --git a/core/src/lib.rs b/core/src/lib.rs
index 22288d1..18c672b 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -5,3 +5,12 @@ pub type Usually<T> = Result<T, Box<dyn Error>>;
 
 /// Standard optional result type.
 pub type Perhaps<T> = Result<Option<T>, Box<dyn Error>>;
+
+/// Implement the `From` trait.
+#[macro_export] macro_rules! from {
+    ($(<$($lt:lifetime),+>)?|$state:ident:$Source:ty|$Target:ty=$cb:expr) => {
+        impl $(<$($lt),+>)? From<$Source> for $Target {
+            fn from ($state:$Source) -> Self { $cb }
+        }
+    };
+}
diff --git a/proc/src/proc_command.rs b/proc/src/proc_command.rs
index bfe9246..f8e9d2a 100644
--- a/proc/src/proc_command.rs
+++ b/proc/src/proc_command.rs
@@ -82,6 +82,7 @@ impl ToTokens for CommandDef {
                 fn get <'source> (&self, iter: &mut ::tengri::dsl::TokenIter<'source>)
                     -> Option<#enumeration>
                 {
+                    use ::tengri::dsl::TryFromDsl;
                     #enumeration::try_from_expr(self, iter)
                 }
             }
diff --git a/tui/src/lib.rs b/tui/src/lib.rs
index 01eb7d9..79648b9 100644
--- a/tui/src/lib.rs
+++ b/tui/src/lib.rs
@@ -33,16 +33,6 @@ pub use ::ratatui; pub(crate) use ratatui::{
 
 pub(crate) use std::sync::{Arc, RwLock, atomic::{AtomicBool, Ordering::*}};
 pub(crate) use std::io::{stdout, Stdout};
-pub(crate) use std::path::PathBuf;
-pub(crate) use std::ffi::OsString;
-
-#[macro_export] macro_rules! from {
-    ($(<$($lt:lifetime),+>)?|$state:ident:$Source:ty|$Target:ty=$cb:expr) => {
-        impl $(<$($lt),+>)? From<$Source> for $Target {
-            fn from ($state:$Source) -> Self { $cb }
-        }
-    };
-}
 
 #[cfg(test)] #[test] fn test_tui_engine () -> Usually<()> {
     use crate::*;