diff --git a/.changeset/unlucky-plums-join.md b/.changeset/unlucky-plums-join.md
new file mode 100644
index 0000000..d61db0c
--- /dev/null
+++ b/.changeset/unlucky-plums-join.md
@@ -0,0 +1,5 @@
+---
+'@sketch-hq/sketch-file-format': patch
+---
+
+Reorganised source code and simplified build process
diff --git a/package.json b/package.json
index e508ea3..8d3a8b2 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "@types/node": "14.14.35",
     "jest": "26.6.3",
     "prettier": "2.2.1",
+    "ts-node": "9.1.1",
     "ts-jest": "26.5.4",
     "typescript": "4.2.3",
     "webpack": "5.28.0",
diff --git a/packages/file-format-ts/package.json b/packages/file-format-ts/package.json
index b06fc46..d7b3a8b 100644
--- a/packages/file-format-ts/package.json
+++ b/packages/file-format-ts/package.json
@@ -22,13 +22,12 @@
   "devDependencies": {
     "@sketch-hq/sketch-file-format": "5.2.3",
     "@types/humps": "2.0.0",
-    "humps": "2.0.1",
-    "ts-node": "9.1.1"
+    "humps": "2.0.1"
   },
   "scripts": {
     "generate": "ts-node ./scripts/generate.ts ./src/types.ts",
     "build": "rm -rf dist && yarn generate && tsc --project tsconfig.json && tsc --project tsconfig.esm.json",
     "test": "jest",
-    "format-check": "prettier --check {**/,}*.{ts,md,json} --ignore-path ../../.prettierignore"
+    "format-check": "prettier --check **.{ts,md,json} --ignore-path ../../.prettierignore"
   }
 }
diff --git a/packages/file-format/package.json b/packages/file-format/package.json
index fa3cdaf..c1901f7 100644
--- a/packages/file-format/package.json
+++ b/packages/file-format/package.json
@@ -36,14 +36,13 @@
     "node-stream-zip": "1.13.2"
   },
   "scripts": {
-    "build": "yarn build:schemas && yarn build:pkg",
-    "build:schemas": "tsc --project tsconfig.schemas.json && yarn n src/build-schemas.js",
-    "build:pkg": "rm -rf dist && mkdir -p dist && tsc --project tsconfig.pkg.json",
-    "validate-schemas": "tsc && yarn n src/validate-schemas.js",
-    "validate-reference-files": "yarn build:schemas && tsc && yarn n src/validate-reference-files.js",
-    "validate-file": "yarn build:schemas && tsc && yarn n src/validate-file.js",
-    "n": "node --experimental-json-modules --es-module-specifier-resolution=node",
+    "build": "yarn build:schemas ./schema ./src && yarn build:pkg",
+    "build:schemas": "ts-node ./scripts/build-schemas.ts",
+    "build:pkg": "rm -rf dist && mkdir -p dist && tsc",
+    "validate-schemas": "ts-node ./scripts/validate-schemas.ts",
+    "validate-reference-files": "yarn build:schemas && ts-node ./scripts/validate-reference-files.ts",
+    "validate-file": "yarn build:schemas && ts-node ./scripts/validate-file.ts",
     "test": "echo \"No test specified\"",
-    "format-check": "prettier --check {schema/{**/,}*.yaml,*.md,src/*.ts} --ignore-path ../../.prettierignore"
+    "format-check": "prettier --check {**.{ts,md,json},schema/**/*.yaml} --ignore-path ../../.prettierignore"
   }
 }
diff --git a/packages/file-format/src/assemble.ts b/packages/file-format/scripts/assemble.ts
similarity index 97%
rename from packages/file-format/src/assemble.ts
rename to packages/file-format/scripts/assemble.ts
index c017cb5..c8096e5 100644
--- a/packages/file-format/src/assemble.ts
+++ b/packages/file-format/scripts/assemble.ts
@@ -13,14 +13,16 @@
  *   - Prune any un-used definitions
  */
 
+/// <reference types="./global" />
+
 import yaml from 'js-yaml'
 import fs from 'fs'
 import globby from 'globby'
-import changeCase from 'change-case'
+import { pascalCase } from 'change-case'
 import { basename } from 'path'
 import deepdash from 'deepdash'
 import _ from 'lodash'
-import jsont from 'json-transforms'
+import * as jsont from 'json-transforms'
 import mergeAllOf from 'json-schema-merge-allof'
 import { JSONSchema7 } from 'json-schema'
 
@@ -32,8 +34,7 @@ deepdash(_)
  *   Input:  ./schemas/foo-bar.schema.yaml
  *   Output: FooBar
  */
-const pathToId = (path: string) =>
-  changeCase.pascalCase(basename(path, '.schema.yaml'))
+const pathToId = (path: string) => pascalCase(basename(path, '.schema.yaml'))
 
 /**
  * Returns a Promise that resolves with the POJO representation of
diff --git a/packages/file-format/scripts/build-schemas.ts b/packages/file-format/scripts/build-schemas.ts
new file mode 100644
index 0000000..d1b4cfa
--- /dev/null
+++ b/packages/file-format/scripts/build-schemas.ts
@@ -0,0 +1,55 @@
+/**
+ * Build all distributable schemas into the `dist` folder.
+ */
+
+import process from 'process'
+
+import { writeFileSync } from 'fs'
+import { execSync } from 'child_process'
+import { basename } from 'path'
+
+import { assemble } from './assemble'
+
+const build = async (entry: string) => {
+  const schema = await assemble(entry)
+  writeFileSync(
+    `src/${basename(entry, '.yaml')}.json`,
+    JSON.stringify(schema, null, 2),
+    { encoding: 'utf8' },
+  )
+}
+
+/**
+ * Both paths for the directory containing the schemas, as well as the directory
+ * the generated JSON Schema should be written to must be provided as a
+ * command-line argument.
+ *
+ *   ts-node build-schemas.ts <schema-dir> <output-dir>
+ */
+const main = async (args: string[]) => {
+  const [schemaDir, outDir] = args.slice(2, 4) // user defined args start at index 2
+  if (!schemaDir) {
+    console.error('missing path to directory containing schemas')
+    process.exit(1)
+  }
+  if (!outDir) {
+    console.error('missing path to output directory for generated JSON Schema')
+    process.exit(1)
+  }
+
+  try {
+    await Promise.all([
+      build(`${schemaDir}/file-format.schema.yaml`),
+      build(`${schemaDir}/document.schema.yaml`),
+      build(`${schemaDir}/meta.schema.yaml`),
+      build(`${schemaDir}/user.schema.yaml`),
+      build(`${schemaDir}/layers/page.schema.yaml`),
+    ])
+    execSync(`yarn prettier --write "${outDir}/*.json"`)
+  } catch (e) {
+    console.error(e)
+    process.exit(1)
+  }
+}
+
+main(process.argv)
diff --git a/packages/file-format/src/global.d.ts b/packages/file-format/scripts/global.d.ts
similarity index 100%
rename from packages/file-format/src/global.d.ts
rename to packages/file-format/scripts/global.d.ts
diff --git a/packages/file-format/src/utils.ts b/packages/file-format/scripts/utils.ts
similarity index 100%
rename from packages/file-format/src/utils.ts
rename to packages/file-format/scripts/utils.ts
diff --git a/packages/file-format/src/validate-file.ts b/packages/file-format/scripts/validate-file.ts
similarity index 100%
rename from packages/file-format/src/validate-file.ts
rename to packages/file-format/scripts/validate-file.ts
diff --git a/packages/file-format/src/validate-reference-files.ts b/packages/file-format/scripts/validate-reference-files.ts
similarity index 100%
rename from packages/file-format/src/validate-reference-files.ts
rename to packages/file-format/scripts/validate-reference-files.ts
diff --git a/packages/file-format/src/validate-schemas.ts b/packages/file-format/scripts/validate-schemas.ts
similarity index 100%
rename from packages/file-format/src/validate-schemas.ts
rename to packages/file-format/scripts/validate-schemas.ts
diff --git a/packages/file-format/src/build-schemas.ts b/packages/file-format/src/build-schemas.ts
deleted file mode 100644
index 1f91035..0000000
--- a/packages/file-format/src/build-schemas.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-/**
- * Build all distributable schemas into the `dist` folder.
- */
-
-import { writeFileSync } from 'fs'
-import { execSync } from 'child_process'
-import { basename } from 'path'
-
-import { assemble } from './assemble'
-
-const build = async (entry: string) => {
-  const schema = await assemble(entry)
-  writeFileSync(
-    `src/${basename(entry, '.yaml')}.json`,
-    JSON.stringify(schema, null, 2),
-    { encoding: 'utf8' },
-  )
-}
-
-const main = async () => {
-  try {
-    await Promise.all([
-      build('schema/file-format.schema.yaml'),
-      build('schema/document.schema.yaml'),
-      build('schema/meta.schema.yaml'),
-      build('schema/user.schema.yaml'),
-      build('schema/layers/page.schema.yaml'),
-    ])
-    execSync('yarn prettier --write "src/*.json"')
-  } catch (e) {
-    console.error(e)
-    process.exit(1)
-  }
-}
-
-main()
diff --git a/packages/file-format/src/index.ts b/packages/file-format/src/index.ts
index cd03189..33ed794 100644
--- a/packages/file-format/src/index.ts
+++ b/packages/file-format/src/index.ts
@@ -1,9 +1,11 @@
 /**
- * This file is the entry point to the published npm module.
+ * This file is the entry point to {@link @sketch-hq/sketch-file-format}.
  */
 
 import { JSONSchema7 } from 'json-schema'
 
+/// All *.schema.json are generated from the schema YAML source by
+/// the `build:schemas` script defined in package.json.
 import fileFormatSchema from './file-format.schema.json'
 import docSchema from './document.schema.json'
 import metaSchema from './meta.schema.json'
diff --git a/packages/file-format/src/package.json b/packages/file-format/src/package.json
deleted file mode 100644
index 3dbc1ca..0000000
--- a/packages/file-format/src/package.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}
diff --git a/packages/file-format/tsconfig.json b/packages/file-format/tsconfig.json
index 03a34be..6f5d1d5 100644
--- a/packages/file-format/tsconfig.json
+++ b/packages/file-format/tsconfig.json
@@ -1,10 +1,12 @@
 {
   "extends": "@tsconfig/recommended/tsconfig.json",
-  "include": ["src/*.ts"],
-  "exclude": ["node_modules", "dist"],
+  "include": ["src/index.ts"],
   "compilerOptions": {
-    "module": "ESNext",
+    "outDir": "dist",
+    "baseUrl": "src",
     "moduleResolution": "node",
-    "resolveJsonModule": true
+    "resolveJsonModule": true,
+    "declaration": true,
+    "declarationMap": true
   }
 }
diff --git a/packages/file-format/tsconfig.pkg.json b/packages/file-format/tsconfig.pkg.json
deleted file mode 100644
index 0e61f54..0000000
--- a/packages/file-format/tsconfig.pkg.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  "extends": "@tsconfig/recommended/tsconfig.json",
-  "include": ["src/index.ts"],
-  "exclude": ["node_modules", "dist"],
-  "compilerOptions": {
-    "outDir": "dist",
-    "baseUrl": "src",
-    "moduleResolution": "node",
-    "resolveJsonModule": true,
-    "declaration": true,
-    "declarationMap": true
-  }
-}
diff --git a/packages/file-format/tsconfig.schemas.json b/packages/file-format/tsconfig.schemas.json
deleted file mode 100644
index 755eb94..0000000
--- a/packages/file-format/tsconfig.schemas.json
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-  "extends": "@tsconfig/recommended/tsconfig.json",
-  "include": ["src/*.ts"],
-  "exclude": [
-    "node_modules",
-    "dist",
-    "src/validate-reference-files.ts",
-    "src/validate-schemas.ts",
-    "src/validate-file.ts",
-    "src/index.ts"
-  ],
-  "compilerOptions": {
-    "module": "ESNext",
-    "moduleResolution": "node",
-    "resolveJsonModule": true
-  }
-}
diff --git a/yarn.lock b/yarn.lock
index 0303587..4f5f1bf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -735,16 +735,6 @@
   dependencies:
     "@sinonjs/commons" "^1.7.0"
 
-"@sketch-hq/sketch-file-format-1@npm:@sketch-hq/sketch-file-format@1.1.7":
-  version "1.1.7"
-  resolved "https://registry.yarnpkg.com/@sketch-hq/sketch-file-format/-/sketch-file-format-1.1.7.tgz#7de3cdfda10c97d21bbe261e0544ca581d27366e"
-  integrity sha512-tEQxuWgXIFn2fNgAiGDszrEGF/sR16O2kOjkB49PJcI7NWq+rwghr6Fx6nSL8dPNXOpYeSQOHGqTvGlVuo9YEA==
-
-"@sketch-hq/sketch-file-format-2@npm:@sketch-hq/sketch-file-format@2.0.3":
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/@sketch-hq/sketch-file-format/-/sketch-file-format-2.0.3.tgz#ed3077b6e146c947b4fe144ef0cacfc67b7e507e"
-  integrity sha512-l/sLUhHayJEair70vQEGBAldpR3K8Xb+WqZGlrVtJT3aZVGGnEAT8i8n8qNMECWBdEojTxC3gKqgiJu9U98nDw==
-
 "@sketch-hq/sketch-reference-files@2.3.0":
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/@sketch-hq/sketch-reference-files/-/sketch-reference-files-2.3.0.tgz#2e8e186ae2b69d3db483f14bd3393d0f8a952b70"