diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0384c01c..b5465c05 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - plugins
   pull_request: {}
 
 jobs:
diff --git a/codegen/src/function.rs b/codegen/src/function.rs
index f3bfd344..0e4f1260 100644
--- a/codegen/src/function.rs
+++ b/codegen/src/function.rs
@@ -3,6 +3,11 @@
 #[cfg(no_std)]
 use core::mem;
 
+#[cfg(no_std)]
+use alloc::format;
+#[cfg(not(no_std))]
+use std::format;
+
 use std::collections::HashMap;
 
 use quote::{quote, quote_spanned};
diff --git a/src/packages/array_basic.rs b/src/packages/array_basic.rs
index a75fe369..c044eddc 100644
--- a/src/packages/array_basic.rs
+++ b/src/packages/array_basic.rs
@@ -3,7 +3,9 @@
 
 use crate::any::{Dynamic, Variant};
 use crate::def_package;
-use crate::engine::{make_getter, Array, Engine};
+#[cfg(not(feature = "no_object"))]
+use crate::engine::make_getter;
+use crate::engine::{Array, Engine};
 use crate::fn_native::FnPtr;
 use crate::parser::{ImmutableString, INT};
 use crate::plugin::*;
diff --git a/src/packages/fn_basic.rs b/src/packages/fn_basic.rs
index 8fe886dc..fd3b5052 100644
--- a/src/packages/fn_basic.rs
+++ b/src/packages/fn_basic.rs
@@ -1,4 +1,5 @@
 use crate::def_package;
+#[cfg(not(feature = "no_object"))]
 use crate::engine::make_getter;
 use crate::fn_native::FnPtr;
 use crate::plugin::*;
diff --git a/src/packages/math_basic.rs b/src/packages/math_basic.rs
index e8b267fb..f8b905b2 100644
--- a/src/packages/math_basic.rs
+++ b/src/packages/math_basic.rs
@@ -1,4 +1,5 @@
 use crate::def_package;
+#[cfg(not(feature = "no_object"))]
 use crate::engine::make_getter;
 use crate::parser::INT;
 use crate::plugin::*;
@@ -211,6 +212,8 @@ mod float_functions {
 mod float_funcs {
     use crate::parser::FLOAT;
     use crate::plugin::*;
+    #[cfg(feature = "no_std")]
+    use num_traits::float::Float;
 
     #[export_fn]
     pub fn floor(x: FLOAT) -> FLOAT {
diff --git a/src/packages/string_more.rs b/src/packages/string_more.rs
index 56f3a1d7..d3b913fa 100644
--- a/src/packages/string_more.rs
+++ b/src/packages/string_more.rs
@@ -2,7 +2,9 @@
 
 use crate::any::Dynamic;
 use crate::def_package;
-use crate::engine::{make_getter, Engine};
+#[cfg(not(feature = "no_object"))]
+use crate::engine::make_getter;
+use crate::engine::Engine;
 use crate::fn_native::FnPtr;
 use crate::parser::{ImmutableString, INT};
 use crate::plugin::*;
@@ -11,11 +13,8 @@ use crate::utils::StaticVec;
 #[cfg(not(feature = "unchecked"))]
 use crate::{result::EvalAltResult, token::Position};
 
-#[cfg(not(feature = "no_index"))]
-use crate::engine::Array;
-
 use crate::stdlib::{
-    any::TypeId, boxed::Box, fmt::Display, format, mem, string::ToString, vec::Vec,
+    any::TypeId, boxed::Box, fmt::Display, format, mem, string::String, string::ToString, vec::Vec,
 };
 
 macro_rules! gen_concat_functions {
@@ -47,8 +46,6 @@ macro_rules! reg_functions {
 
 def_package!(crate:MoreStringPackage:"Additional string utilities, including string building.", lib, {
     reg_functions!(lib += basic; INT, bool, char, FnPtr);
-    set_exported_fn!(lib, "+", string_funcs::append_unit);
-    set_exported_fn!(lib, "+", string_funcs::prepend_unit);
 
     #[cfg(not(feature = "only_i32"))]
     #[cfg(not(feature = "only_i64"))]
@@ -64,8 +61,8 @@ def_package!(crate:MoreStringPackage:"Additional string utilities, including str
 
     #[cfg(not(feature = "no_index"))]
     {
-        set_exported_fn!(lib, "+", string_funcs::append_array);
-        set_exported_fn!(lib, "+", string_funcs::prepend_array);
+        set_exported_fn!(lib, "+", string_funcs_array::append_array);
+        set_exported_fn!(lib, "+", string_funcs_array::prepend_array);
     }
 
     lib.combine(exported_module!(string_functions));
@@ -192,11 +189,28 @@ mod string_functions {
     }
 }
 
-mod string_funcs {
+#[cfg(not(feature = "no_index"))]
+mod string_funcs_array {
     use crate::engine::Array;
+    use crate::plugin::*;
+    use crate::utils::ImmutableString;
+    use crate::stdlib::string::String;
+
+    #[export_fn]
+    pub fn append_array(x: &mut ImmutableString, y: Array) -> String {
+        format!("{}{:?}", x, y)
+    }
+    #[export_fn]
+    pub fn prepend_array(x: &mut Array, y: ImmutableString) -> String {
+        format!("{:?}{}", x, y)
+    }
+}
+
+mod string_funcs {
     use crate::parser::INT;
     use crate::plugin::*;
     use crate::utils::{ImmutableString, StaticVec};
+    use crate::stdlib::string::{String, ToString};
 
     #[export_fn]
     pub fn append_unit(s: ImmutableString, _x: ()) -> ImmutableString {
@@ -207,14 +221,6 @@ mod string_funcs {
         s
     }
     #[export_fn]
-    pub fn append_array(x: &mut ImmutableString, y: Array) -> String {
-        format!("{}{:?}", x, y)
-    }
-    #[export_fn]
-    pub fn prepend_array(x: &mut Array, y: ImmutableString) -> String {
-        format!("{:?}{}", x, y)
-    }
-    #[export_fn]
     pub fn len(s: &mut ImmutableString) -> INT {
         s.chars().count() as INT
     }
diff --git a/src/packages/time_basic.rs b/src/packages/time_basic.rs
index ce0f9abf..0b3cad13 100644
--- a/src/packages/time_basic.rs
+++ b/src/packages/time_basic.rs
@@ -5,6 +5,7 @@
 use super::math_basic::MAX_INT;
 
 use crate::def_package;
+#[cfg(not(feature = "no_object"))]
 use crate::engine::make_getter;
 use crate::plugin::*;
 use crate::result::EvalAltResult;
@@ -98,7 +99,7 @@ fn time_diff(ts1: Instant, ts2: Instant) -> Result<Dynamic, Box<EvalAltResult>>
             .into();
         }
 
-        Ok(-(seconds as INT).into())
+        Ok(Dynamic::from(-(seconds as INT)))
     } else {
         let seconds = (ts1 - ts2).as_secs();
 
diff --git a/src/plugin.rs b/src/plugin.rs
index 19e9939a..b03df99c 100644
--- a/src/plugin.rs
+++ b/src/plugin.rs
@@ -3,6 +3,8 @@
 pub use crate::{
     stdlib::any::TypeId,
     stdlib::boxed::Box,
+    stdlib::format,
+    stdlib::string::ToString,
     stdlib::vec::Vec,
     stdlib::vec as new_vec,
     stdlib::mem,