diff --git a/packages/chacha20poly1305/dnt.ts b/packages/chacha20poly1305/dnt.ts
index e66eb68be..625682695 100644
--- a/packages/chacha20poly1305/dnt.ts
+++ b/packages/chacha20poly1305/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/chacha20poly1305");
-await emptyDir("../../npm/samples/chacha20poly1305");
-await emptyDir("../../npm/test/chacha20poly1305/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("chacha20poly1305");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/chacha20poly1305",
@@ -69,20 +62,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/chacha20poly1305",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/chacha20poly1305/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/chacha20poly1305/LICENSE");
-Deno.copyFileSync(
-  "README.md",
-  "../../npm/packages/chacha20poly1305/README.md",
-);
+afterBuild("chacha20poly1305");
diff --git a/packages/core/dnt.ts b/packages/core/dnt.ts
index 16b0fccef..000ede85c 100644
--- a/packages/core/dnt.ts
+++ b/packages/core/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/core");
-await emptyDir("../../npm/samples/core");
-await emptyDir("../../npm/test/core/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("core");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/core",
@@ -67,17 +60,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/core",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/core/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/core/LICENSE");
-Deno.copyFileSync("README.md", "../../npm/packages/core/README.md");
+afterBuild("core");
diff --git a/packages/dhkem-secp256k1/dnt.ts b/packages/dhkem-secp256k1/dnt.ts
index e96df1446..7221130c5 100644
--- a/packages/dhkem-secp256k1/dnt.ts
+++ b/packages/dhkem-secp256k1/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/dhkem-secp256k1");
-await emptyDir("../../npm/samples/dhkem-secp256k1");
-await emptyDir("../../npm/test/dhkem-secp256k1/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("dhkem-secp256k1");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/dhkem-secp256k1",
@@ -69,20 +62,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/dhkem-secp256k1",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/dhkem-secp256k1/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/dhkem-secp256k1/LICENSE");
-Deno.copyFileSync(
-  "README.md",
-  "../../npm/packages/dhkem-secp256k1/README.md",
-);
+afterBuild("dhkem-secp256k1");
diff --git a/packages/dhkem-x25519/dnt.ts b/packages/dhkem-x25519/dnt.ts
index cd3e2ce1b..4372efa35 100644
--- a/packages/dhkem-x25519/dnt.ts
+++ b/packages/dhkem-x25519/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "jsr:@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/dhkem-x25519");
-await emptyDir("../../npm/samples/dhkem-x25519");
-await emptyDir("../../npm/test/dhkem-x25519/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("dhkem-x25519");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/dhkem-x25519",
@@ -69,17 +62,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/dhkem-x25519",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/dhkem-x25519/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/dhkem-x25519/LICENSE");
-Deno.copyFileSync("README.md", "../../npm/packages/dhkem-x25519/README.md");
+afterBuild("dhkem-x25519");
diff --git a/packages/dhkem-x448/dnt.ts b/packages/dhkem-x448/dnt.ts
index ed4340e07..aeef2c78b 100644
--- a/packages/dhkem-x448/dnt.ts
+++ b/packages/dhkem-x448/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/dhkem-x448");
-await emptyDir("../../npm/samples/dhkem-x448");
-await emptyDir("../../npm/test/dhkem-x448/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("dhkem-x448");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/dhkem-x448",
@@ -69,17 +62,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/dhkem-x448",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/dhkem-x448/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/dhkem-x448/LICENSE");
-Deno.copyFileSync("README.md", "../../npm/packages/dhkem-x448/README.md");
+afterBuild("dhkem-x448");
diff --git a/packages/hpke-js/dnt.ts b/packages/hpke-js/dnt.ts
index d1b13d151..c28a40f07 100644
--- a/packages/hpke-js/dnt.ts
+++ b/packages/hpke-js/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/hpke-js");
-await emptyDir("../../npm/samples/hpke-js");
-await emptyDir("../../npm/test/hpke-js/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("hpke-js");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/hpke-js",
@@ -73,17 +66,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/hpke-js",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/hpke-js/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/hpke-js/LICENSE");
-Deno.copyFileSync("README.md", "../../npm/packages/hpke-js/README.md");
+afterBuild("hpke-js");
diff --git a/packages/hybridkem-x-wing/dnt.ts b/packages/hybridkem-x-wing/dnt.ts
index b54edb278..fb3bfddeb 100644
--- a/packages/hybridkem-x-wing/dnt.ts
+++ b/packages/hybridkem-x-wing/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/hybridkem-x-wing");
-await emptyDir("../../npm/samples/hybridkem-x-wing");
-await emptyDir("../../npm/test/hybridkem-x-wing/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("hybridkem-x-wing");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/hybridkem-x-wing",
@@ -70,23 +63,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/hybridkem-x-wing",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/hybridkem-x-wing/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync(
-  "LICENSE",
-  "../../npm/packages/hybridkem-x-wing/LICENSE",
-);
-Deno.copyFileSync(
-  "README.md",
-  "../../npm/packages/hybridkem-x-wing/README.md",
-);
+afterBuild("hybridkem-x-wing");
diff --git a/packages/hybridkem-x25519-kyber768/dnt.ts b/packages/hybridkem-x25519-kyber768/dnt.ts
index 413d9c98f..59400a02a 100644
--- a/packages/hybridkem-x25519-kyber768/dnt.ts
+++ b/packages/hybridkem-x25519-kyber768/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/hybridkem-x25519-kyber768");
-await emptyDir("../../npm/samples/hybridkem-x25519-kyber768");
-await emptyDir("../../npm/test/hybridkem-x25519-kyber768/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("hybridkem-x25519-kyber768");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/hybridkem-x25519-kyber768",
@@ -69,23 +62,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/hybridkem-x25519-kyber768",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/hybridkem-x25519-kyber768/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync(
-  "LICENSE",
-  "../../npm/packages/hybridkem-x25519-kyber768/LICENSE",
-);
-Deno.copyFileSync(
-  "README.md",
-  "../../npm/packages/hybridkem-x25519-kyber768/README.md",
-);
+afterBuild("hybridkem-x25519-kyber768");
diff --git a/packages/ml-kem/dnt.ts b/packages/ml-kem/dnt.ts
index 067590912..48dd6719a 100644
--- a/packages/ml-kem/dnt.ts
+++ b/packages/ml-kem/dnt.ts
@@ -1,17 +1,10 @@
-import { build, emptyDir } from "@deno/dnt";
-import { copySync } from "@std/fs";
-import { removeNodeModules } from "../../utils/misc.ts";
-
-// clean up dist
-await emptyDir("../../npm/packages/ml-kem");
-await emptyDir("../../npm/samples/ml-kem");
-await emptyDir("../../npm/test/ml-kem/runtimes/cloudflare");
-
-// clean up node_modules
-await removeNodeModules();
+import { build } from "@deno/dnt";
+import { afterBuild, beforeBuild } from "../../utils/dntCommon.ts";
 
 const denoPkg = JSON.parse(await Deno.readTextFile("./deno.json"));
 
+await beforeBuild("ml-kem");
+
 await build({
   entryPoints: ["./mod.ts"],
   outDir: "../../npm/packages/ml-kem",
@@ -68,17 +61,4 @@ await build({
   },
 });
 
-copySync(
-  "samples/node",
-  "../../npm/samples/ml-kem",
-  { overwrite: true },
-);
-copySync(
-  "test/runtimes/cloudflare",
-  "../../npm/test/ml-kem/runtimes/cloudflare",
-  { overwrite: true },
-);
-
-// post build steps
-Deno.copyFileSync("LICENSE", "../../npm/packages/ml-kem/LICENSE");
-Deno.copyFileSync("README.md", "../../npm/packages/ml-kem/README.md");
+afterBuild("ml-kem");
diff --git a/utils/dntCommon.ts b/utils/dntCommon.ts
new file mode 100644
index 000000000..acab87252
--- /dev/null
+++ b/utils/dntCommon.ts
@@ -0,0 +1,48 @@
+import { emptyDir } from "@deno/dnt";
+import { copySync } from "@std/fs";
+
+export async function beforeBuild(name: string): Promise<void> {
+  // Clean up dist
+  await emptyDir(`../../npm/packages/${name}`);
+  await emptyDir(`../../npm/samples/${name}`);
+  await emptyDir(`../../npm/test/${name}/runtimes/cloudflare`);
+
+  // Remove node_modules
+  try {
+    await Deno.remove("test/runtimes/browsers/node_modules", {
+      recursive: true,
+    });
+  } catch {
+    // ignore
+  }
+  try {
+    await Deno.remove("test/runtimes/bun/node_modules", {
+      recursive: true,
+    });
+  } catch {
+    // ignore
+  }
+  try {
+    await Deno.remove("test/runtimes/cloudflare/node_modules", {
+      recursive: true,
+    });
+  } catch {
+    // ignore
+  }
+  return;
+}
+
+export function afterBuild(name: string) {
+  copySync(
+    "samples/node",
+    `../../npm/samples/${name}`,
+    { overwrite: true },
+  );
+  copySync(
+    "test/runtimes/cloudflare",
+    `../../npm/test/${name}/runtimes/cloudflare`,
+    { overwrite: true },
+  );
+  Deno.copyFileSync("LICENSE", `../../npm/packages/${name}/LICENSE`);
+  Deno.copyFileSync("README.md", `../../npm/packages/${name}/README.md`);
+}
diff --git a/utils/misc.ts b/utils/misc.ts
deleted file mode 100644
index 7a3f39247..000000000
--- a/utils/misc.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-export async function removeNodeModules() {
-  try {
-    await Deno.remove("test/runtimes/browsers/node_modules", {
-      recursive: true,
-    });
-  } catch {
-    // ignore
-  }
-  try {
-    await Deno.remove("test/runtimes/bun/node_modules", {
-      recursive: true,
-    });
-  } catch {
-    // ignore
-  }
-  try {
-    await Deno.remove("test/runtimes/cloudflare/node_modules", {
-      recursive: true,
-    });
-  } catch {
-    // ignore
-  }
-  return;
-}