diff --git a/packages/lib-ethers/.npmignore b/packages/lib-ethers/.npmignore
index 016e6d939..2cd20eff1 100644
--- a/packages/lib-ethers/.npmignore
+++ b/packages/lib-ethers/.npmignore
@@ -1,4 +1,3 @@
 /live
 /accounts.json
-/dist/deployments/dev.json
 /temp
diff --git a/packages/lib-ethers/package.json b/packages/lib-ethers/package.json
index 806670cf3..7dcf43304 100644
--- a/packages/lib-ethers/package.json
+++ b/packages/lib-ethers/package.json
@@ -17,6 +17,7 @@
   "scripts": {
     "hardhat": "hardhat",
     "check-live-version": "ts-node scripts/check-live-version.ts",
+    "prepublishOnly": "ts-node scripts/delete-dev-deployments.ts",
     "prepare": "run-s prepare:*",
     "prepare:deployments": "ts-node scripts/copy-deployments.ts",
     "prepare:types": "ts-node scripts/generate-types.ts",
diff --git a/packages/lib-ethers/scripts/delete-dev-deployments.ts b/packages/lib-ethers/scripts/delete-dev-deployments.ts
new file mode 100644
index 000000000..c9dd57b1d
--- /dev/null
+++ b/packages/lib-ethers/scripts/delete-dev-deployments.ts
@@ -0,0 +1,17 @@
+import fs from "fs";
+import path from "path";
+
+const deploymentsDir = "deployments";
+const devDeploymentName = "dev.json";
+
+const exists = (file: string) => fs.existsSync(file) && fs.lstatSync(file).isFile();
+
+const devDeployments = () =>
+  fs
+    .readdirSync(deploymentsDir, { withFileTypes: true })
+    .filter(dirent => dirent.isDirectory() && dirent.name !== "backfill")
+    .map(deploymentDir => path.join(deploymentsDir, deploymentDir.name, devDeploymentName))
+    .concat(path.join(deploymentsDir, devDeploymentName))
+    .filter(exists);
+
+devDeployments().forEach(devDeployment => fs.unlinkSync(devDeployment));