diff --git a/Build/build-reject-domainset.ts b/Build/build-reject-domainset.ts
index 9f5d98e3..2c82ca8b 100644
--- a/Build/build-reject-domainset.ts
+++ b/Build/build-reject-domainset.ts
@@ -76,6 +76,16 @@ export const buildRejectDomainSet = task(require.main === module, __filename)(as
   await span
     .traceChild('download and process hosts / adblock filter rules')
     .traceAsyncFn((childSpan) => Promise.all([
+      // Dedupe domainSets
+      // Collect DOMAIN, DOMAIN-SUFFIX, and DOMAIN-KEYWORD from non_ip/reject.conf for deduplication
+      // DOMAIN-WILDCARD is not really useful for deduplication, it is only included in AdGuardHome output
+      // It is faster to add base than add others first then whitelist
+      rejectOutput.addFromRuleset(readLocalRejectRulesetPromise),
+      rejectExtraOutput.addFromRuleset(readLocalRejectRulesetPromise),
+      readLocalRejectDomainsetPromise.then(appendArrayToRejectOutput),
+      readLocalRejectDomainsetPromise.then(appendArrayToRejectExtraOutput),
+      readLocalRejectExtraDomainsetPromise.then(appendArrayToRejectExtraOutput),
+
       // Parse from remote hosts & domain lists
       hostsDownloads.map(task => task(childSpan).then(appendArrayToRejectOutput)),
       hostsExtraDownloads.map(task => task(childSpan).then(appendArrayToRejectExtraOutput)),
@@ -109,18 +119,7 @@ export const buildRejectDomainSet = task(require.main === module, __filename)(as
           addArrayElementsToSet(filterRuleWhitelistDomainSets, blackDomainSuffixes, suffix => '.' + suffix);
         })
       ),
-      getPhishingDomains(childSpan).then(appendArrayToRejectExtraOutput),
-      readLocalRejectDomainsetPromise.then(appendArrayToRejectOutput),
-      readLocalRejectDomainsetPromise.then(appendArrayToRejectExtraOutput),
-      readLocalRejectExtraDomainsetPromise.then(appendArrayToRejectExtraOutput),
-      // Dedupe domainSets
-      // span.traceChildAsync('collect black keywords/suffixes', async () =>
-      /**
-         * Collect DOMAIN, DOMAIN-SUFFIX, and DOMAIN-KEYWORD from non_ip/reject.conf for deduplication
-         * DOMAIN-WILDCARD is not really useful for deduplication, it is only included in AdGuardHome output
-        */
-      rejectOutput.addFromRuleset(readLocalRejectRulesetPromise),
-      rejectExtraOutput.addFromRuleset(readLocalRejectRulesetPromise)
+      getPhishingDomains(childSpan).then(appendArrayToRejectExtraOutput)
     ].flat()));
 
   if (foundDebugDomain.value) {
diff --git a/Build/lib/rules/base.ts b/Build/lib/rules/base.ts
index c22aa566..ac29964f 100644
--- a/Build/lib/rules/base.ts
+++ b/Build/lib/rules/base.ts
@@ -124,8 +124,8 @@ export class FileOutput {
     return this;
   }
 
-  private async addFromDomainsetPromise(source: AsyncIterable<string> | Iterable<string> | string[]) {
-    for await (const line of source) {
+  private async addFromDomainsetPromise(source: MaybePromise<AsyncIterable<string> | Iterable<string> | string[]>) {
+    for await (const line of await source) {
       if (line[0] === '.') {
         this.addDomainSuffix(line, true);
       } else {
@@ -136,23 +136,15 @@ export class FileOutput {
 
   addFromDomainset(source: MaybePromise<AsyncIterable<string> | Iterable<string> | string[]>) {
     if (this.pendingPromise) {
-      if ('then' in source) {
-        this.pendingPromise = this.pendingPromise.then(() => source).then(src => this.addFromDomainsetPromise(src));
-        return this;
-      }
       this.pendingPromise = this.pendingPromise.then(() => this.addFromDomainsetPromise(source));
       return this;
     }
-    if ('then' in source) {
-      this.pendingPromise = source.then(src => this.addFromDomainsetPromise(src));
-      return this;
-    }
     this.pendingPromise = this.addFromDomainsetPromise(source);
     return this;
   }
 
-  private async addFromRulesetPromise(source: AsyncIterable<string> | Iterable<string> | string[]) {
-    for await (const line of source) {
+  private async addFromRulesetPromise(source: MaybePromise<AsyncIterable<string> | Iterable<string> | string[]>) {
+    for await (const line of await source) {
       const splitted = line.split(',');
       const type = splitted[0];
       const value = splitted[1];
@@ -216,17 +208,9 @@ export class FileOutput {
 
   addFromRuleset(source: MaybePromise<AsyncIterable<string> | Iterable<string>>) {
     if (this.pendingPromise) {
-      if ('then' in source) {
-        this.pendingPromise = this.pendingPromise.then(() => source).then(src => this.addFromRulesetPromise(src));
-        return this;
-      }
       this.pendingPromise = this.pendingPromise.then(() => this.addFromRulesetPromise(source));
       return this;
     }
-    if ('then' in source) {
-      this.pendingPromise = source.then(src => this.addFromRulesetPromise(src));
-      return this;
-    }
     this.pendingPromise = this.addFromRulesetPromise(source);
     return this;
   }