diff --git a/packages/components/src/components/SquiggleChart.tsx b/packages/components/src/components/SquiggleChart.tsx
index d9ab3168..08c0c4ff 100644
--- a/packages/components/src/components/SquiggleChart.tsx
+++ b/packages/components/src/components/SquiggleChart.tsx
@@ -2,7 +2,6 @@ import * as React from "react";
 import {
   SqValue,
   environment,
-  defaultEnvironment,
   resultMap,
   SqValueTag,
   SqProject,
@@ -56,22 +55,19 @@ export type SquiggleChartProps = {
 
 // Props needed for a standalone execution
 type StandaloneExecutionProps = {
-  /** Project must be undefined */
   project?: undefined;
-  /** Includes must be undefined */
-  includes?: undefined;
+  continues?: undefined;
   /** The amount of points returned to draw the distribution, not needed if using a project */
   environment?: environment;
 };
 
 // Props needed when executing inside a project.
 type ProjectExecutionProps = {
-  /** environment must be undefined (we don't set it here, users can set the environment outside the execution) */
   environment?: undefined;
   /** The project that this execution is part of */
   project: SqProject;
-  /** What other squiggle sources from the project to include. Default none */
-  includes?: string[];
+  /** What other squiggle sources from the project to continue. Default [] */
+  continues?: string[];
 };
 const defaultOnChange = () => {};
 const defaultImports: JsImports = {};
@@ -98,18 +94,24 @@ export const SquiggleChart: React.FC<SquiggleChartProps> = React.memo(
       xAxisType = "number",
       distributionChartActions,
       enableLocalSettings = false,
-      project = SqProject.create(),
       code,
-      includes = [],
+      continues = [],
     } = props;
 
-    const p = project ?? SqProject.create();
-    if (!project && props.environment) {
-      p.setEnvironment(props.environment);
-    }
+    const p = React.useMemo(() => {
+      if (props.project) {
+        return props.project;
+      } else {
+        const p = SqProject.create();
+        if (props.environment) {
+          p.setEnvironment(props.environment);
+        }
+        return p;
+      }
+    }, [props.project, props.environment]);
 
     const { result, bindings } = useSquiggle({
-      includes,
+      continues,
       project: p,
       code,
       jsImports,
diff --git a/packages/components/src/index.ts b/packages/components/src/index.ts
index aac6944b..b8a6e385 100644
--- a/packages/components/src/index.ts
+++ b/packages/components/src/index.ts
@@ -1,6 +1,5 @@
-import { SqProject } from "@quri/squiggle-lang/";
+export { SqProject } from "@quri/squiggle-lang/";
 export { SquiggleChart } from "./components/SquiggleChart";
 export { SquiggleEditor } from "./components/SquiggleEditor";
 export { SquigglePlayground } from "./components/SquigglePlayground";
 export { SquiggleContainer } from "./components/SquiggleContainer";
-export const newProject = () => SqProject.create();
diff --git a/packages/components/src/lib/hooks/useSquiggle.ts b/packages/components/src/lib/hooks/useSquiggle.ts
index 7594781a..7f6fed96 100644
--- a/packages/components/src/lib/hooks/useSquiggle.ts
+++ b/packages/components/src/lib/hooks/useSquiggle.ts
@@ -8,7 +8,7 @@ type SquiggleArgs = {
   executionId?: number;
   jsImports?: JsImports;
   project: SqProject;
-  includes: string[];
+  continues: string[];
   onChange?: (expr: SqValue | undefined, sourceName: string) => void;
 };
 
@@ -17,18 +17,20 @@ const importSourceName = (sourceName: string) => "imports-" + sourceName;
 export const useSquiggle = (args: SquiggleArgs) => {
   const sourceName = useMemo(() => uuid.v4(), []);
 
+  const env = args.project.getEnvironment();
+
   const result = useMemo(
     () => {
       const project = args.project;
 
       project.setSource(sourceName, args.code);
-      let includes = args.includes;
+      let continues = args.continues;
       if (args.jsImports && Object.keys(args.jsImports).length) {
         const importsSource = jsImportsToSquiggleCode(args.jsImports);
         project.setSource(importSourceName(sourceName), importsSource);
-        includes.push(importSourceName(sourceName));
+        continues = args.continues.concat(importSourceName(sourceName));
       }
-      project.setContinues(sourceName, includes);
+      project.setContinues(sourceName, continues);
       project.run(sourceName);
       const result = project.getResult(sourceName);
       const bindings = project.getBindings(sourceName);
@@ -43,8 +45,9 @@ export const useSquiggle = (args: SquiggleArgs) => {
       args.jsImports,
       args.executionId,
       sourceName,
-      args.includes,
+      args.continues,
       args.project,
+      env,
     ]
   );
 
@@ -61,7 +64,7 @@ export const useSquiggle = (args: SquiggleArgs) => {
     return () => {
       args.project.removeSource(sourceName);
       if (args.project.getSource(importSourceName(sourceName)))
-        args.project.removeSource(sourceName);
+        args.project.removeSource(importSourceName(sourceName));
     };
   }, [args.project, sourceName]);
 
diff --git a/packages/components/test/cleanup.test.tsx b/packages/components/test/cleanup.test.tsx
index 7bd109e4..d2be427a 100644
--- a/packages/components/test/cleanup.test.tsx
+++ b/packages/components/test/cleanup.test.tsx
@@ -4,7 +4,7 @@ import "@testing-library/jest-dom";
 import { SquiggleChart } from "../src/index";
 import { SqProject } from "@quri/squiggle-lang";
 
-test("Creates and cleans up source with no name", async () => {
+test("Creates and cleans up source", async () => {
   const project = SqProject.create();
 
   const { unmount } = render(
@@ -20,3 +20,20 @@ test("Creates and cleans up source with no name", async () => {
   expect(project.getSourceIds().length).toBe(0);
   expect(project.getSource(sourceId)).toBe(undefined);
 });
+
+test("Creates and cleans up source and imports", async () => {
+  const project = SqProject.create();
+
+  const { unmount } = render(
+    <SquiggleChart
+      code={"normal($x, 1)"}
+      project={project}
+      jsImports={{ x: 3 }}
+    />
+  );
+
+  expect(project.getSourceIds().length).toBe(2);
+
+  unmount();
+  expect(project.getSourceIds()).toStrictEqual([]);
+});