diff --git a/.yarn/sdks/eslint/package.json b/.yarn/sdks/eslint/package.json
index f9a43496..9c05985b 100644
--- a/.yarn/sdks/eslint/package.json
+++ b/.yarn/sdks/eslint/package.json
@@ -1,6 +1,6 @@
 {
   "name": "eslint",
-  "version": "0.0.0-sdk",
+  "version": "7.26.0-sdk",
   "main": "./lib/api.js",
   "type": "commonjs"
 }
diff --git a/.yarn/sdks/prettier/package.json b/.yarn/sdks/prettier/package.json
index 8a59ec19..dab222ef 100644
--- a/.yarn/sdks/prettier/package.json
+++ b/.yarn/sdks/prettier/package.json
@@ -1,6 +1,6 @@
 {
   "name": "prettier",
-  "version": "0.0.0-sdk",
+  "version": "2.3.2-sdk",
   "main": "./index.js",
   "type": "commonjs"
 }
diff --git a/.yarn/sdks/typescript/package.json b/.yarn/sdks/typescript/package.json
index fbe09807..ea85e133 100644
--- a/.yarn/sdks/typescript/package.json
+++ b/.yarn/sdks/typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "typescript",
-  "version": "0.0.0-sdk",
+  "version": "4.3.5-sdk",
   "main": "./lib/typescript.js",
   "type": "commonjs"
 }
diff --git a/HACKING.md b/HACKING.md
index ff819a8b..ebead73d 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -32,12 +32,16 @@ cd scripts/launchpad/contracts
 sha256sum -c checksums.sha256
 ```
 
+## Installation
+
+1. Install dependencies: `yarn install`
+2. Install SDKs (to make IDE integration work): `yarn dlx @yarnpkg/sdks`
+
 ## Running tests
 
 For unit tests that don't connect to any blockchain, just do:
 
 ```sh
-yarn install
 yarn test
 ```