diff --git a/src/compiler/builder.ts b/src/compiler/builder.ts
index d90453ebbe0..0ebedbb764b 100644
--- a/src/compiler/builder.ts
+++ b/src/compiler/builder.ts
@@ -1229,7 +1229,7 @@ function ensureHasErrorsForState(state: BuilderProgramStateWithDefinedProgram) {
 
 function ensurePackageJsonsForState(state: BuilderProgramStateWithDefinedProgram, host: BuilderProgramHost) {
     if (state.packageJsons !== undefined) return;
-    let packageJsons: string[] = [];
+    const packageJsons: string[] = [];
     if (state.program.getCompilerOptions().configFilePath) {
         const internalMap = state.program.getModuleResolutionCache()?.getPackageJsonInfoCache().getInternalMap();
         if (internalMap) {
diff --git a/src/compiler/tsbuildPublic.ts b/src/compiler/tsbuildPublic.ts
index dcaf895f2e1..fbd2211b2da 100644
--- a/src/compiler/tsbuildPublic.ts
+++ b/src/compiler/tsbuildPublic.ts
@@ -1,6 +1,5 @@
 import {
     AffectedFileResult,
-    arrayFrom,
     assertType,
     BuilderProgram,
     BuildInfo,
@@ -11,7 +10,6 @@ import {
     clearMap,
     closeFileWatcher,
     closeFileWatcherOf,
-    combinePaths,
     commonOptionsWithBuild,
     CompilerHost,
     CompilerOptions,
@@ -49,7 +47,6 @@ import {
     flattenDiagnosticMessageText,
     forEach,
     forEachEntry,
-    forEachKey,
     ForegroundColorEscapeSequences,
     formatColorAndReset,
     getAllProjectOutputs,
@@ -79,7 +76,6 @@ import {
     isIgnoredFileFromWildCardWatching,
     isIncrementalBuildInfo,
     isIncrementalCompilation,
-    isPackageJsonInfo,
     isSolutionConfig,
     loadWithModeAwareCache,
     maybeBind,