diff --git a/package.json b/package.json
index 24373260..9c80940c 100644
--- a/package.json
+++ b/package.json
@@ -104,8 +104,7 @@
   },
   "homepage": "https://github.com/pmndrs/valtio",
   "dependencies": {
-    "proxy-compare": "2.5.1",
-    "derive-valtio": "0.1.0"
+    "proxy-compare": "2.5.1"
   },
   "devDependencies": {
     "@babel/core": "^7.23.2",
diff --git a/src/vanilla/utils.ts b/src/vanilla/utils.ts
index 7c2c59b2..43b71f3a 100644
--- a/src/vanilla/utils.ts
+++ b/src/vanilla/utils.ts
@@ -1,7 +1,6 @@
 export { subscribeKey } from './utils/subscribeKey.ts'
 export { watch } from './utils/watch.ts'
 export { devtools } from './utils/devtools.ts'
-export { derive, underive, unstable_deriveSubscriptions } from 'derive-valtio'
 export { deepClone } from './utils/deepClone.ts'
 export { proxyWithHistory } from './utils/proxyWithHistory.ts'
 export { proxySet } from './utils/proxySet.ts'
diff --git a/tests/derive.test.tsx b/tests/derive.test.tsx
deleted file mode 100644
index b0610f23..00000000
--- a/tests/derive.test.tsx
+++ /dev/null
@@ -1,501 +0,0 @@
-/// <reference types="react/canary" />
-
-import ReactExports, { StrictMode, Suspense, useEffect, useRef } from 'react'
-import { fireEvent, render } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-import { proxy, snapshot, subscribe, useSnapshot } from 'valtio'
-import { derive, underive } from 'valtio/utils'
-
-type DeriveGet = <T extends object>(proxyObject: T) => T
-
-const sleep = (ms: number) =>
-  new Promise((resolve) => {
-    setTimeout(resolve, ms)
-  })
-
-const { use } = ReactExports
-const use2 = <T,>(x: T): Awaited<T> => (x instanceof Promise ? use(x) : x)
-
-it('basic derive', async () => {
-  const computeDouble = vi.fn((x: number) => x * 2)
-  const state = proxy({
-    text: '',
-    count: 0,
-  })
-  const derived = derive({
-    doubled: (get) => computeDouble(get(state).count),
-  })
-
-  const callback = vi.fn()
-  subscribe(derived, callback)
-
-  expect(snapshot(derived)).toMatchObject({ doubled: 0 })
-  expect(computeDouble).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state.count += 1
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  state.text = 'a'
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(3)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-})
-
-it('derive another proxy', async () => {
-  const computeDouble = vi.fn((x: number) => x * 2)
-  const state = proxy({
-    text: '',
-    count: 0,
-  })
-  const anotherState = proxy({})
-  derive(
-    {
-      doubled: (get) => computeDouble(get(state).count),
-    },
-    {
-      proxy: anotherState,
-    },
-  )
-
-  const callback = vi.fn()
-  subscribe(anotherState, callback)
-
-  expect(snapshot(anotherState)).toMatchObject({ doubled: 0 })
-  expect(computeDouble).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state.count += 1
-  await Promise.resolve()
-  expect(snapshot(anotherState)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  state.text = 'a'
-  await Promise.resolve()
-  expect(snapshot(anotherState)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(3)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-})
-
-it('derive with self', async () => {
-  const computeDouble = vi.fn((x: number) => x * 2)
-  const state = proxy({
-    text: '',
-    count: 0,
-  })
-  derive(
-    {
-      doubled: (get) => computeDouble(get(state).count),
-    },
-    {
-      proxy: state,
-    },
-  )
-
-  const callback = vi.fn()
-  subscribe(state, callback)
-
-  expect(snapshot(state)).toMatchObject({ text: '', count: 0, doubled: 0 })
-  expect(computeDouble).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state.count += 1
-  await Promise.resolve()
-  expect(snapshot(state)).toMatchObject({ text: '', count: 1, doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  state.text = 'a'
-  await Promise.resolve()
-  expect(snapshot(state)).toMatchObject({ text: 'a', count: 1, doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(3)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(2)
-})
-
-it('derive with two dependencies', async () => {
-  const computeSum = vi.fn((x: number, y: number) => x + y)
-  const state1 = proxy({ count: 1 })
-  const state2 = proxy({ count: 10 })
-  const derived = derive({
-    sum: (get) => computeSum(get(state1).count, get(state2).count),
-  })
-
-  const callback = vi.fn()
-  subscribe(derived, callback)
-
-  expect(snapshot(derived)).toMatchObject({ sum: 11 })
-  expect(computeSum).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state1.count += 1
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ sum: 12 })
-  expect(computeSum).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  state1.count += 1
-  state2.count += 10
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ sum: 23 })
-  expect(computeSum).toBeCalledTimes(3)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(2)
-})
-
-it.skipIf(typeof use === 'undefined')('async derive', async () => {
-  const state = proxy({ count: 0 })
-  derive(
-    {
-      delayedCount: async (get) => {
-        await sleep(300)
-        return get(state).count + 1
-      },
-    },
-    { proxy: state },
-  )
-
-  const Counter = () => {
-    const snap = useSnapshot(
-      state as { count: number; delayedCount: Promise<number> },
-    )
-    return (
-      <>
-        <div>
-          count: {snap.count}, delayedCount: {use2(snap.delayedCount)}
-        </div>
-        <button onClick={() => ++state.count}>button</button>
-      </>
-    )
-  }
-
-  const { getByText, findByText } = render(
-    <StrictMode>
-      <Suspense fallback="loading">
-        <Counter />
-      </Suspense>
-    </StrictMode>,
-  )
-
-  await findByText('loading')
-  await findByText('count: 0, delayedCount: 1')
-
-  fireEvent.click(getByText('button'))
-  await findByText('loading')
-  await findByText('count: 1, delayedCount: 2')
-})
-
-it('nested emulation with derive', async () => {
-  const computeDouble = vi.fn((x: number) => x * 2)
-  const state = proxy({ text: '', math: { count: 0 } })
-  derive(
-    {
-      doubled: (get) => computeDouble(get(state.math).count),
-    },
-    { proxy: state.math, sync: true },
-  )
-
-  const callback = vi.fn()
-  subscribe(state, callback)
-
-  expect(snapshot(state)).toMatchObject({
-    text: '',
-    math: { count: 0, doubled: 0 },
-  })
-  expect(computeDouble).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state.math.count += 1
-  await Promise.resolve()
-  expect(snapshot(state)).toMatchObject({
-    text: '',
-    math: { count: 1, doubled: 2 },
-  })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  state.text = 'a'
-  await Promise.resolve()
-  expect(snapshot(state)).toMatchObject({
-    text: 'a',
-    math: { count: 1, doubled: 2 },
-  })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(2)
-})
-
-it('derive with array.pop', async () => {
-  const state = proxy({
-    arr: [{ n: 1 }, { n: 2 }, { n: 3 }],
-  })
-  derive(
-    {
-      nums: (get) => get(state.arr).map((item) => item.n),
-    },
-    { proxy: state },
-  )
-
-  expect(snapshot(state)).toMatchObject({
-    arr: [{ n: 1 }, { n: 2 }, { n: 3 }],
-    nums: [1, 2, 3],
-  })
-
-  state.arr.pop()
-  await Promise.resolve()
-  expect(snapshot(state)).toMatchObject({
-    arr: [{ n: 1 }, { n: 2 }],
-    nums: [1, 2],
-  })
-})
-
-it('basic underive', async () => {
-  const computeDouble = vi.fn((x: number) => x * 2)
-  const state = proxy({ count: 0 })
-  const derived = derive({
-    doubled: (get) => computeDouble(get(state).count),
-  })
-
-  const callback = vi.fn()
-  subscribe(derived, callback)
-
-  expect(snapshot(derived)).toMatchObject({ doubled: 0 })
-  expect(computeDouble).toBeCalledTimes(1)
-  expect(callback).toBeCalledTimes(0)
-
-  state.count += 1
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-
-  underive(derived)
-
-  state.count += 1
-  await Promise.resolve()
-  expect(snapshot(derived)).toMatchObject({ doubled: 2 })
-  expect(computeDouble).toBeCalledTimes(2)
-  await Promise.resolve()
-  expect(callback).toBeCalledTimes(1)
-})
-
-describe('glitch free', () => {
-  it('basic (#296)', async () => {
-    const state = proxy({ value: 0 })
-    const derived1 = derive({ value: (get) => get(state).value })
-    const derived2 = derive({ value: (get) => get(derived1).value })
-    const computeValue = vi.fn((get: DeriveGet) => {
-      const v0 = get(state).value
-      const v1 = get(derived1).value
-      const v2 = get(derived2).value
-      return `v0: ${v0}, v1: ${v1}, v2: ${v2}`
-    })
-    const derived3 = derive({ value: computeValue })
-
-    const App = () => {
-      const snap = useSnapshot(derived3)
-      const commitsRef = useRef(1)
-      useEffect(() => {
-        commitsRef.current += 1
-      })
-      return (
-        <>
-          value: {snap.value} (commits: {commitsRef.current})
-          <button onClick={() => ++state.value}>button</button>
-        </>
-      )
-    }
-
-    const { getByText, findByText } = render(
-      <>
-        <App />
-      </>,
-    )
-
-    await findByText('value: v0: 0, v1: 0, v2: 0 (commits: 1)')
-    expect(computeValue).toBeCalledTimes(1)
-
-    fireEvent.click(getByText('button'))
-    await findByText('value: v0: 1, v1: 1, v2: 1 (commits: 2)')
-    expect(computeValue).toBeCalledTimes(2)
-  })
-
-  it('same value', async () => {
-    const state = proxy({ value: 0 })
-    const derived1 = derive({
-      value: (get) => get(state).value * 0,
-    })
-    const derived2 = derive({
-      value: (get) => get(derived1).value * 0,
-    })
-    const computeValue = vi.fn((get: DeriveGet) => {
-      const v0 = get(state).value
-      const v1 = get(derived1).value
-      const v2 = get(derived2).value
-      return v0 + (v1 - v2)
-    })
-    const derived3 = derive({
-      value: (get) => computeValue(get),
-    })
-
-    const App = () => {
-      const snap = useSnapshot(derived3)
-      return (
-        <div>
-          value: {snap.value}
-          <button onClick={() => ++state.value}>button</button>
-        </div>
-      )
-    }
-
-    const { getByText, findByText } = render(
-      <StrictMode>
-        <App />
-      </StrictMode>,
-    )
-
-    await findByText('value: 0')
-    expect(computeValue).toBeCalledTimes(1)
-
-    fireEvent.click(getByText('button'))
-    await findByText('value: 1')
-    expect(computeValue).toBeCalledTimes(2)
-  })
-
-  it('double chain', async () => {
-    const state = proxy({ value: 0 })
-    const derived1 = derive({
-      value: (get) => get(state).value,
-    })
-    const derived2 = derive({
-      value: (get) => get(derived1).value,
-    })
-    const derived3 = derive({
-      value: (get) => get(derived2).value,
-    })
-    const computeValue = vi.fn((get: DeriveGet) => {
-      const v0 = get(state).value
-      const v1 = get(derived1).value
-      const v2 = get(derived2).value
-      const v3 = get(derived3).value
-      return v0 + (v1 - v2) + v3 * 0
-    })
-    const derived4 = derive({
-      value: (get) => computeValue(get),
-    })
-
-    const App = () => {
-      const snap = useSnapshot(derived4)
-      return (
-        <div>
-          value: {snap.value}
-          <button onClick={() => ++state.value}>button</button>
-        </div>
-      )
-    }
-
-    const { getByText, findByText } = render(
-      <StrictMode>
-        <App />
-      </StrictMode>,
-    )
-
-    await findByText('value: 0')
-    expect(computeValue).toBeCalledTimes(1)
-
-    fireEvent.click(getByText('button'))
-    await findByText('value: 1')
-    expect(computeValue).toBeCalledTimes(2)
-  })
-})
-
-describe('two derived properties', () => {
-  type State = {
-    a: number
-    derived1?: unknown
-    derived2?: unknown
-  }
-
-  it('two derived properties both returning primitive values (#349)', async () => {
-    const state: State = proxy({ a: 1 })
-    derive(
-      {
-        derived1: (get) => {
-          get(state).a
-          return 1
-        },
-      },
-      { proxy: state },
-    )
-    derive(
-      {
-        derived2: (get) => {
-          get(state).a
-          return 1
-        },
-      },
-      { proxy: state },
-    )
-    await Promise.resolve()
-    expect(state.derived1).toBeDefined()
-    expect(state.derived2).toBeDefined()
-  })
-
-  it('two derived properties both returning non primitive values, defined at the same time (#349)', async () => {
-    const state: State = proxy({ a: 1 })
-    derive(
-      {
-        derived1: (get) => {
-          get(state).a
-          return {}
-        },
-        derived2: (get) => {
-          get(state).a
-          return {}
-        },
-      },
-      { proxy: state },
-    )
-    await Promise.resolve()
-    expect(state.derived1).toBeDefined()
-    expect(state.derived2).toBeDefined()
-  })
-
-  it('two derived properties both returning non primitive values (#349)', async () => {
-    const state: State = proxy({ a: 1 })
-    derive(
-      {
-        derived1: (get) => {
-          get(state).a
-          return {}
-        },
-      },
-      { proxy: state },
-    )
-    derive(
-      {
-        derived2: (get) => {
-          get(state).a
-          return {}
-        },
-      },
-      { proxy: state },
-    )
-    await Promise.resolve()
-    expect(state.derived1).toBeDefined()
-    expect(state.derived2).toBeDefined()
-  })
-})
diff --git a/yarn.lock b/yarn.lock
index 425392e3..f4f5899a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2322,11 +2322,6 @@ delayed-stream@~1.0.0:
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
   integrity sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==
 
-derive-valtio@0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/derive-valtio/-/derive-valtio-0.1.0.tgz#4b9fb393dfefccfef15fcbbddd745dd22d5d63d7"
-  integrity sha512-OCg2UsLbXK7GmmpzMXhYkdO64vhJ1ROUUGaTFyHjVwEdMEcTTRj7W1TxLbSBxdY8QLBPCcp66MTyaSy0RpO17A==
-
 diff-sequences@^29.4.3:
   version "29.6.3"
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-29.6.3.tgz#4deaf894d11407c51efc8418012f9e70b84ea921"