diff --git a/scripts/tasks/ts.ts b/scripts/tasks/ts.ts
index 94493729686123..74f321bbf74c86 100644
--- a/scripts/tasks/ts.ts
+++ b/scripts/tasks/ts.ts
@@ -28,17 +28,7 @@ function prepareTsTaskConfig(options: TscTaskOptions) {
     logger.info(`📣 TSC: package is using TS path aliases. Overriding tsconfig settings.`);
 
     const tsConfigOutDir = tsConfig.compilerOptions.outDir as string;
-
-    const hasNewCompilationSetup = tsConfigOutDir.includes('dist/out-tsc');
-
-    if (hasNewCompilationSetup) {
-      options.outDir = `${tsConfigOutDir}/${options.outDir}`;
-    } else {
-      // TODO: remove after all v9 is migrated to new tsc processing
-      options.baseUrl = '.';
-      options.rootDir = './src';
-    }
-
+    options.outDir = `${tsConfigOutDir}/${options.outDir}`;
     options.project = tsConfigFile;
   }
 
diff --git a/scripts/tasks/utils.ts b/scripts/tasks/utils.ts
index 60ac3cf3daaa32..52a4bbe38c6993 100644
--- a/scripts/tasks/utils.ts
+++ b/scripts/tasks/utils.ts
@@ -60,14 +60,6 @@ export function getTsPathAliasesApiExtractorConfig(options: {
   packageJson: PackageJson;
   definitionsRootPath: string;
 }) {
-  const hasNewCompilationSetup = ((options.tsConfig.compilerOptions as unknown) as { outDir: string }).outDir.includes(
-    'dist/out-tsc',
-  );
-  // TODO: after all v9 is migrated to new tsc processing use only createNormalizedTsPaths
-  const normalizedPaths = hasNewCompilationSetup
-    ? createNormalizedTsPaths({ definitionsRootPath: options.definitionsRootPath, rootTsConfig })
-    : undefined;
-
   /**
    * Customized TSConfig that uses `tsconfig.lib.json` as base with some required overrides:
    *
@@ -96,7 +88,7 @@ export function getTsPathAliasesApiExtractorConfig(options: {
        * just-scripts provides invalid types for tsconfig, thus `paths` cannot be set to dictionary,nor null or `{}`
        */
       // @ts-expect-error - just-scripts provides invalid types
-      paths: normalizedPaths,
+      paths: createNormalizedTsPaths({ definitionsRootPath: options.definitionsRootPath, rootTsConfig }),
     },
   };