diff --git a/std/functional.ucg b/std/functional.ucg
index c7a64f1..ba86bb3 100644
--- a/std/functional.ucg
+++ b/std/functional.ucg
@@ -16,14 +16,14 @@
 let maybe = module{
     val = NULL,
 } => ({do=do, is_null=is_null, or=or, unwrap=unwrap, expect=expect}) {
-    let maybe = mod.pkg().maybe;
+    let this = mod.this;
 
-    let do = func (op) =>  select (mod.val != NULL), maybe{val=NULL}, {
-        true = maybe{val=op(mod.val)},
+    let do = func (op) =>  select (mod.val != NULL), this{val=NULL}, {
+        true = this{val=op(mod.val)},
     };
 
-    let or = func (op) => select (mod.val == NULL), maybe{val=mod.val}, {
-        true = maybe{val=op()},
+    let or = func (op) => select (mod.val == NULL), this{val=mod.val}, {
+        true = this{val=op()},
     };
 
     let is_null = func() => mod.val == NULL;
diff --git a/std/lists.ucg b/std/lists.ucg
index 74e61fb..93f7f85 100644
--- a/std/lists.ucg
+++ b/std/lists.ucg
@@ -169,14 +169,14 @@ let ops = module{
        reverse=reverse,
        list=list,
       }) {
-    let super = mod.pkg();
+    let pkg = mod.pkg();
     let list = mod.list;
-    let len = super.len(mod.list);
-    let str_join = func(sep) => super.str_join{list=mod.list, sep=sep};
+    let len = pkg.len(mod.list);
+    let str_join = func(sep) => pkg.str_join{list=mod.list, sep=sep};
     
-    let slice = func(start, end) => super.slice{start=start, end=end, list=mod.list};
-    let enumerate = func() => super.ops{list=super.enumerate{start=0, step=1, list=mod.list}};
-    let tail = func() => super.ops{list=super.tail(mod.list)};
-    let head = func() => super.head(mod.list);
-    let reverse = func() => super.ops{list=super.reverse(mod.list)};
+    let slice = func(start, end) => pkg.slice{start=start, end=end, list=mod.list};
+    let enumerate = func() => pkg.ops{list=pkg.enumerate{start=0, step=1, list=mod.list}};
+    let tail = func() => pkg.ops{list=pkg.tail(mod.list)};
+    let head = func() => pkg.head(mod.list);
+    let reverse = func() => mod.this{list=pkg.reverse(mod.list)};
 };
\ No newline at end of file
diff --git a/std/schema.ucg b/std/schema.ucg
index 951e267..c000e39 100644
--- a/std/schema.ucg
+++ b/std/schema.ucg
@@ -92,18 +92,19 @@ let shaped = module {
     partial = true,
 } => (result) {
     let schema = mod.pkg();
+    let this = mod.this;
 
     let simple_handler = func (val, shape) => val is schema.base_type_of(shape);
 
     let tuple_handler = func (acc, name, value) => acc{
         ok = select (name) in acc.shape, mod.partial, {
-            true = schema.shaped{val=value, shape=acc.shape.(name), partial=mod.partial},
+            true = this{val=value, shape=acc.shape.(name), partial=mod.partial},
         },
     };
 
     let shape_tuple_handler = func (acc, field_name, value) => acc{
         ok = select (field_name) in acc.val, false, {
-            true = schema.shaped{val=value, shape=acc.val.(field_name), partial=false},
+            true = this{val=value, shape=acc.val.(field_name), partial=false},
         },
     };
 
@@ -117,7 +118,7 @@ let shaped = module {
         ok = acc.ok && schema.any{val=value, types=acc.shape},
     };
 
-    let result =select schema.base_type_of(mod.val), false, {
+    let result = select schema.base_type_of(mod.val), false, {
         str = simple_handler(mod.val, mod.shape),
         int = simple_handler(mod.val, mod.shape),
         float = simple_handler(mod.val, mod.shape),
diff --git a/std/strings.ucg b/std/strings.ucg
index cdbbcec..8dd17c0 100644
--- a/std/strings.ucg
+++ b/std/strings.ucg
@@ -65,14 +65,14 @@ let ops = module {
         start = 0,
         end = len,
     } => (result) {
-        let filepkg = mod.pkg();
+        let pkg = mod.pkg();
         let reducer = func(acc, char) => acc{
             counter = acc.counter + 1,
             str = select ((acc.counter >= mod.start) && (acc.counter <= mod.end)), acc.str, {
                 true = acc.str + char,
             },
         };
-        let result = filepkg.ops{str=reduce(
+        let result = pkg.ops{str=reduce(
             reducer, {counter = 0, str = ""}, mod.str).str};
     };
 };
\ No newline at end of file
diff --git a/std/tuples.ucg b/std/tuples.ucg
index bc1e17e..2fd404a 100644
--- a/std/tuples.ucg
+++ b/std/tuples.ucg
@@ -48,11 +48,11 @@ let ops = module{
 } => ({fields=fields, values=values, iter=iter}) {
     (mod.tpl != NULL) || fail "tpl must not be null";
     
-    let super = mod.pkg();
+    let pkg = mod.pkg();
     
-    let fields = func() => super.fields{tpl=mod.tpl};
-    let values = func() => super.values{tpl=mod.tpl};
-    let iter = func() => super.iter{tpl=mod.tpl};
+    let fields = func() => pkg.fields{tpl=mod.tpl};
+    let values = func() => pkg.values{tpl=mod.tpl};
+    let iter = func() => pkg.iter{tpl=mod.tpl};
 };
 
 // Strip all the null fields from a tuple.
@@ -71,11 +71,11 @@ let has_fields = module{
     tpl = NULL,
     fields = [],
 } => (result) {
-    let lib = mod.pkg();
+    let pkg = mod.pkg();
     // First we check that mod.tpl is a tuple.
-    lib.assert_tuple(mod.tpl);
+    pkg.assert_tuple(mod.tpl);
 
-    let fs = lib.fields{tpl=mod.tpl};
+    let fs = pkg.fields{tpl=mod.tpl};
 
     let result = reduce(func (acc, f) => acc && (f in fs), true, mod.fields);
 };
@@ -86,9 +86,9 @@ let field_type = module{
     field = NULL,
     type = NULL,
 } => (result) {
-    let lib = mod.pkg();
+    let pkg = mod.pkg();
     // First we check that mod.tpl is a tuple.
-    lib.assert_tuple(mod.tpl);
+    pkg.assert_tuple(mod.tpl);
 
     // Next we assert that mod.field is a string.
     select mod.field is "str", NULL, {
@@ -101,7 +101,7 @@ let field_type = module{
     };
 
     // Get the list of field value pairs.
-    let it = lib.iter{tpl=mod.tpl};
+    let it = pkg.iter{tpl=mod.tpl};
 
     // The reducer function used to check the field's types if it exists. 
     let reducer = func (acc, l) => acc && (select l.0 == mod.field, NULL, {
@@ -110,5 +110,5 @@ let field_type = module{
     });
 
     // The computed answer true or false.
-    let result = lib.has_fields{tpl=mod.tpl, fields=[mod.field]} && reduce(reducer, true, it);
+    let result = pkg.has_fields{tpl=mod.tpl, fields=[mod.field]} && reduce(reducer, true, it);
 };