diff --git a/.eslintrc.json b/.eslintrc.json
index 0e42f00a28..a06a7eb4be 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,9 +1,6 @@
 {
     "extends": ["@pixi/eslint-config"],
     "plugins": ["jsdoc"],
-    "parserOptions": {
-        "project": ["./tsconfig.eslint.json"]
-    },
     "ignorePatterns": ["**/*.index.d.ts"],
     "settings": {
         "jsdoc": {
diff --git a/packages/canvas-renderer/src/utils/mapCanvasBlendModesToPixi.ts b/packages/canvas-renderer/src/utils/mapCanvasBlendModesToPixi.ts
index 696a5b850d..01c02c056b 100644
--- a/packages/canvas-renderer/src/utils/mapCanvasBlendModesToPixi.ts
+++ b/packages/canvas-renderer/src/utils/mapCanvasBlendModesToPixi.ts
@@ -9,6 +9,7 @@ import { canUseNewCanvasBlendModes } from './canUseNewCanvasBlendModes';
  * @param {string[]} [array=[]] - The array to output into.
  * @returns {string[]} Mapped modes.
  */
+// TODO after upgrading to typeScript 4.6, replace `string[]` with `GlobalCompositeOperation[]`
 export function mapCanvasBlendModesToPixi(array: string[] = []): string[]
 {
     if (canUseNewCanvasBlendModes())
@@ -27,7 +28,7 @@ export function mapCanvasBlendModesToPixi(array: string[] = []): string[]
         array[BLEND_MODES.DIFFERENCE] = 'difference';
         array[BLEND_MODES.EXCLUSION] = 'exclusion';
         array[BLEND_MODES.HUE] = 'hue';
-        array[BLEND_MODES.SATURATION] = 'saturate';
+        array[BLEND_MODES.SATURATION] = 'saturation';
         array[BLEND_MODES.COLOR] = 'color';
         array[BLEND_MODES.LUMINOSITY] = 'luminosity';
     }
diff --git a/rollup.config.js b/rollup.config.js
index cdccf8721a..e6cb492ff1 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -48,9 +48,7 @@ async function main()
         }),
         commonjs(),
         json(),
-        typescript({
-            tsconfig: path.resolve(__dirname, 'tsconfig.build.json'),
-        }),
+        typescript({ downlevelIteration: false }),
         string({
             include: [
                 '**/*.frag',
diff --git a/tsconfig.build.json b/tsconfig.build.json
deleted file mode 100644
index b6362093e1..0000000000
--- a/tsconfig.build.json
+++ /dev/null
@@ -1,41 +0,0 @@
-{
-    "compilerOptions": {
-        "target": "es6",
-        "allowJs": false,
-        "sourceMap": true,
-        "removeComments": false,
-        "strict": true,
-        "noImplicitAny": true,
-        "noUnusedLocals": true,
-        "noUnusedParameters": true,
-        "noImplicitReturns": true,
-        "strictNullChecks": false,
-        "allowSyntheticDefaultImports": true,
-        "moduleResolution": "node",
-        "resolveJsonModule": true,
-        "baseUrl": "./",
-        "paths": {
-            "@pixi/*": [
-                "packages/*/src"
-            ],
-            "pixi.js": [
-                "bundles/pixi.js/src"
-            ],
-            "pixi.js-legacy": [
-                "bundles/pixi.js-legacy/src"
-            ]
-        },
-        "outDir": "./out",
-        "declaration": true
-    },
-    "exclude": [
-        "node_modules",
-        "**/dist/**",
-        "**/lib/**",
-        "**/scripts/**",
-        "**/test/**",
-        "**/types/**",
-        "bundles/**/*.d.ts",
-        "rollup.config.js"
-    ]
-}
diff --git a/tsconfig.eslint.json b/tsconfig.eslint.json
deleted file mode 100644
index 1f2c04ea4e..0000000000
--- a/tsconfig.eslint.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "extends": "./tsconfig.json",
-    "compilerOptions": {
-        "target": "es6",
-        "allowSyntheticDefaultImports": true,
-        "esModuleInterop": true,
-        "module": "commonjs",
-        "baseUrl": "./",
-        "paths": {
-            "@pixi/*": [
-                "packages/*/src"
-            ]
-        },
-    },
-    "exclude": [
-        "node_modules",
-        "**/dist/**",
-        "**/lib/**"
-    ]
-}