diff --git a/README.md b/README.md
index 3918825fcf..228931396d 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,9 @@ You will find TTFs, as well as WOFF(2) web fonts and one Webfont CSS in the `dis
 
 Since version 2.0, Iosevka would no longer support building via `makefile`. To initialize a custom build, you need:
 
-1. Add a new term into `buildPlans` in `build-plans.toml`, following this format:
+1. Create `private-build-plans.toml` file.
+
+2. Add a build plan into `private-build-plans.toml`, following this format:
 
    ```toml
    [buildPlans.iosevka-custom]            # <iosevka-custom> is your plan name
@@ -64,9 +66,28 @@ Since version 2.0, Iosevka would no longer support building via `makefile`. To i
    upright = ["upright-only", "styles"]   # Upright-only styles
    italic = ["italic-only", "styles"]     # Italic-only styles
    oblique = ["oblique-only", "styles"]   # Oblique-only styles
+   
+   # Override default building weights
+   # When buildPlans.<plan name>.weights is absent
+   # All weights would built and mapped to default shape/CSS
+   [buildPlans.iosevka-custom.weights.regular]
+   shape = 400                            # Weight of glyph shapes
+   css   = 400                            # Weight of menu and CSS
+   
+   [buildPlans.iosevka-custom.weights.bold]
+   shape = 700
+   css   = 700
+   
+   # Override default building slant sets
+   # Format: <upright|italic|oblique> = <"normal"|"italic"|"oblique">
+   # When this section is absent, all slants would be built.
+   [buildPlans.iosevka-custom.slants]
+   upright = "normal"
+   italic = "italic"
+   oblique = "oblique"
    ```
 
-2. Run `npm run build -- contents:<your plan name>` and the built fonts would be avaliable in `dist/`. Aside from `contents:<plan>`, other options are:
+3. Run `npm run build -- contents:<your plan name>` and the built fonts would be avaliable in `dist/`. Aside from `contents:<plan>`, other options are:
 
    1. `contents:<plan>` : TTF (Hinted and Unhinted), WOFF(2) and Webfont CSS;
    2. `ttf:<plan>` : TTF;
diff --git a/build-plans.toml b/build-plans.toml
index 04f423a293..ca6163e038 100644
--- a/build-plans.toml
+++ b/build-plans.toml
@@ -176,7 +176,6 @@ from = [
 # Weight mappings (style => shape weight, CSS weight)
 #   Shape weight : affects the shape of the glyphs
 #   CSS weight   : affects the font menu name and webfont CSS
-# Comment the lines to build less weights
 [weights.thin]
 shape = 100
 css   = 100
@@ -220,18 +219,3 @@ css   = 900
 upright = "normal"
 italic = "italic"
 oblique = "oblique"
-
-
-################################################
-# To define your custom build                  #
-# Add a new term into buildPlans               #
-# and run `npm run build -- fonts:<plan name>` #
-################################################
-# [buildPlans.iosevka-custom]            # <iosevka-custom> is your plan name
-# family = "Iosevka Custom"              # Font menu family name
-# design = ["common styles"]             # Common styles
-# upright = ["upright-only", "styles"]   # Upright-only styles
-# italic = ["italic-only", "styles"]     # Italic-only styles
-# oblique = ["oblique-only", "styles"]   # Oblique-only styles
-# weights = ["regular", "bold"]          # Build only regular and bold fonts
-# slants = ["upright", "italic"]         # Build only upright and italic fonts
diff --git a/verdafile.js b/verdafile.js
index aba9acaf77..5bc408e68b 100644
--- a/verdafile.js
+++ b/verdafile.js
@@ -86,8 +86,7 @@ oracle("o:slants").def(async target => {
 	return rp.slants;
 });
 
-oracle(`o:suffixes`).def(async target => {
-	const [weights, slants] = await target.need(`o:weights`, `o:slants`);
+function getSuffixSet(weights, slants) {
 	const mapping = {};
 	for (const w in weights) {
 		for (const s in slants) {
@@ -104,18 +103,28 @@ oracle(`o:suffixes`).def(async target => {
 		}
 	}
 	return mapping;
+}
+
+oracle(`o:suffixes`).def(async target => {
+	const [weights, slants] = await target.need(`o:weights`, `o:slants`);
+	return getSuffixSet(weights, slants);
 });
 
 oracle(`o:font-building-parameters`).def(async target => {
-	const [buildPlans, suffixMapping] = await target.need(`o:build-plans`, `o:suffixes`);
+	const [buildPlans, defaultWeights, defaultSlants] = await target.need(
+		`o:build-plans`,
+		`o:weights`,
+		`o:slants`
+	);
 	const fontInfos = {};
 	const bp = {};
 	for (const p in buildPlans) {
 		const { pre, post, prefix, family, weights, slants } = buildPlans[p];
 		const targets = [];
+		const suffixMapping = getSuffixSet(weights || defaultWeights, slants || defaultSlants);
 		for (const suffix in suffixMapping) {
-			if (weights && !weights.includes(suffixMapping[suffix].weight)) continue;
-			if (slants && !slants.includes(suffixMapping[suffix].slant)) continue;
+			if (weights && !weights[suffixMapping[suffix].weight]) continue;
+			if (slants && !slants[suffixMapping[suffix].slant]) continue;
 			const fileName = [prefix, suffix].join("-");
 			const preHives = [...pre.design, ...pre[suffixMapping[suffix].slant]];
 			const postHives = [...post.design, ...post[suffixMapping[suffix].slant]];
@@ -223,7 +232,7 @@ file(`${DIST}/*/ttf/*.ttf`).def(async (target, dir, file) => {
 		`${DIST}/${dir}/ttf-unhinted/${file}.ttf`,
 		`dir:${target.path.dir}`
 	);
-	await run("ttfautohint", "-c", from.full, target.path.full);
+	await run("ttfautohint", from.full, target.path.full);
 });
 file(`${DIST}/*/woff/*.woff`).def(async (target, dir, file) => {
 	const [from] = await target.need(`${DIST}/${dir}/ttf/${file}.ttf`, `dir:${target.path.dir}`);