diff --git a/bundles/pixi.js-legacy/package.json b/bundles/pixi.js-legacy/package.json
index 8d5b405..56d8e1a 100644
--- a/bundles/pixi.js-legacy/package.json
+++ b/bundles/pixi.js-legacy/package.json
@@ -20,7 +20,8 @@
     "url": "https://github.com/pixijs/pixi.js.git"
   },
   "scripts": {
-    "test": "floss --path test"
+    "test": "floss --path test",
+    "postversion": "cd ../.. && npm run build"
   },
   "files": [
     "lib/"

diff --git a/bundles/pixi.js-legacy/package.json b/bundles/pixi.js-legacy/package.json
index 8d5b405..56d8e1a 100644
--- a/bundles/pixi.js-legacy/package.json
+++ b/bundles/pixi.js-legacy/package.json
@@ -20,7 +20,8 @@
     "url": "https://github.com/pixijs/pixi.js.git"
   },
   "scripts": {
-    "test": "floss --path test"
+    "test": "floss --path test",
+    "postversion": "cd ../.. && npm run build"
   },
   "files": [
     "lib/"
diff --git a/package.json b/package.json
index 5c427a4..f679767 100644
--- a/package.json
+++ b/package.json
@@ -3,24 +3,26 @@
   "scripts": {
     "postinstall": "npm run bootstrap",
     "bootstrap": "lerna bootstrap --hoist",
-    "preclean": "rimraf \"{bundles,packages,packages/canvas,packages/filters}/*/lib\"",
+    "clean:build": "rimraf \"{bundles,packages,packages/canvas,packages/filters}/*/lib\"",
+    "preclean": "npm run clean:build",
     "clean": "lerna clean",
-    "predeploy": "npm run docs",
     "pretest": "npm run lint && npm run build:dev",
     "test": "floss --path test",
     "unit-test": "floss --path test",
     "docs": "jsdoc -c jsdoc.conf.json -R README.md",
     "lint": "eslint *.js test bundles packages tools --ignore-path .gitignore --max-warnings 0",
     "lintfix": "npm run lint -- --fix",
-    "build": "rollup -c --prod",
+    "prebuild": "npm run clean:build",
+    "build": "npm run build:prod",
     "build:dev": "rollup -c",
+    "build:prod": "rollup -c --prod",
     "watch": "rollup -cw",
     "lerna": "lerna",
     "predist": "rimraf dist/*",
-    "dist": "npm run docs && npm run build -- --scope \"pixi.js*\"",
+    "dist": "npm run docs && npm run build:prod -- --scope \"pixi.js*\"",
     "postdist": "copyfiles -f \"bundles/*/dist/*\" dist",
-    "prepub": "npm run build && npm run unit-test",
-    "pub": "lerna publish"
+    "prerelease": "npm run clean:build && npm test",
+    "release": "lerna publish"
   },
   "devDependencies": {
     "@pixi/jsdoc-template": "^2.2.0",

diff --git a/bundles/pixi.js-legacy/package.json b/bundles/pixi.js-legacy/package.json
index 8d5b405..56d8e1a 100644
--- a/bundles/pixi.js-legacy/package.json
+++ b/bundles/pixi.js-legacy/package.json
@@ -20,7 +20,8 @@
     "url": "https://github.com/pixijs/pixi.js.git"
   },
   "scripts": {
-    "test": "floss --path test"
+    "test": "floss --path test",
+    "postversion": "cd ../.. && npm run build"
   },
   "files": [
     "lib/"
diff --git a/package.json b/package.json
index 5c427a4..f679767 100644
--- a/package.json
+++ b/package.json
@@ -3,24 +3,26 @@
   "scripts": {
     "postinstall": "npm run bootstrap",
     "bootstrap": "lerna bootstrap --hoist",
-    "preclean": "rimraf \"{bundles,packages,packages/canvas,packages/filters}/*/lib\"",
+    "clean:build": "rimraf \"{bundles,packages,packages/canvas,packages/filters}/*/lib\"",
+    "preclean": "npm run clean:build",
     "clean": "lerna clean",
-    "predeploy": "npm run docs",
     "pretest": "npm run lint && npm run build:dev",
     "test": "floss --path test",
     "unit-test": "floss --path test",
     "docs": "jsdoc -c jsdoc.conf.json -R README.md",
     "lint": "eslint *.js test bundles packages tools --ignore-path .gitignore --max-warnings 0",
     "lintfix": "npm run lint -- --fix",
-    "build": "rollup -c --prod",
+    "prebuild": "npm run clean:build",
+    "build": "npm run build:prod",
     "build:dev": "rollup -c",
+    "build:prod": "rollup -c --prod",
     "watch": "rollup -cw",
     "lerna": "lerna",
     "predist": "rimraf dist/*",
-    "dist": "npm run docs && npm run build -- --scope \"pixi.js*\"",
+    "dist": "npm run docs && npm run build:prod -- --scope \"pixi.js*\"",
     "postdist": "copyfiles -f \"bundles/*/dist/*\" dist",
-    "prepub": "npm run build && npm run unit-test",
-    "pub": "lerna publish"
+    "prerelease": "npm run clean:build && npm test",
+    "release": "lerna publish"
   },
   "devDependencies": {
     "@pixi/jsdoc-template": "^2.2.0",
diff --git a/packages/particles/src/ParticleRenderer.js b/packages/particles/src/ParticleRenderer.js
index 5464211..03ec012 100644
--- a/packages/particles/src/ParticleRenderer.js
+++ b/packages/particles/src/ParticleRenderer.js
@@ -447,7 +447,11 @@
 
         super.destroy();
 
-        this.shader.destroy();
+        if (this.shader)
+        {
+            this.shader.destroy();
+            this.shader = null;
+        }
 
         this.indices = null;
         this.tempMatrix = null;