diff --git a/.github/workflows/gradle-pr-build.yml b/.github/workflows/gradle-pr-build.yml
index 549e025780..6d4b2bb5de 100644
--- a/.github/workflows/gradle-pr-build.yml
+++ b/.github/workflows/gradle-pr-build.yml
@@ -8,7 +8,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [windows-latest]
         java: [ 8, 11 ]
     runs-on: ${{ matrix.os }}
     steps:
@@ -20,7 +20,7 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with release Kotlin version
-      run: ./gradlew clean build ktlint
+      run: ./gradlew --stacktrace clean build ktlint
     - name: Upload artifacts
       uses: actions/upload-artifact@v2
       if: failure()
@@ -29,4 +29,4 @@ jobs:
         path: '**/build/**/dependency-verification-report.html'
         if-no-files-found: warn
     - name: Build with dev Kotlin version
-      run: ./gradlew -PkotlinDev clean build ktlint
+      run: ./gradlew --stacktrace -PkotlinDev clean build ktlint
diff --git a/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/FileUtils.kt b/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/FileUtils.kt
index 2646e17a29..74e07684b6 100644
--- a/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/FileUtils.kt
+++ b/ktlint/src/main/kotlin/com/pinterest/ktlint/internal/FileUtils.kt
@@ -8,6 +8,7 @@ import java.io.File
 import java.nio.file.FileSystem
 import java.nio.file.FileVisitResult
 import java.nio.file.Files
+import java.nio.file.InvalidPathException
 import java.nio.file.Path
 import java.nio.file.Paths
 import java.nio.file.SimpleFileVisitor
@@ -23,28 +24,43 @@ internal fun FileSystem.fileSequence(
 ): Sequence<Path> {
     checkGlobsContainAbsolutePath(globs)
 
-    val pathMatchers = if (globs.isEmpty()) {
+    val result = mutableListOf<Path>()
+
+    val (existingFiles, actualGlobs) = globs.partition {
+        try {
+            Files.isRegularFile(rootDir.resolve(it))
+        } catch (e: InvalidPathException) {
+            false
+        }
+    }
+    existingFiles.mapTo(result) { rootDir.resolve(it) }
+
+    // Return early and don't traverse the file system if all the input globs are absolute paths
+    if (result.isNotEmpty() && actualGlobs.isEmpty()) {
+        return result.asSequence()
+    }
+
+    val pathMatchers = if (actualGlobs.isEmpty()) {
         setOf(
             getPathMatcher("glob:**$globSeparator*.kt"),
             getPathMatcher("glob:**$globSeparator*.kts")
         )
     } else {
-        globs
+        actualGlobs
             .filterNot { it.startsWith("!") }
             .map {
                 getPathMatcher(it.toGlob(rootDir))
             }
     }
 
-    val negatedPathMatchers = if (globs.isEmpty()) {
+    val negatedPathMatchers = if (actualGlobs.isEmpty()) {
         emptySet()
     } else {
-        globs
+        actualGlobs
             .filter { it.startsWith("!") }
             .map { getPathMatcher(it.removePrefix("!").toGlob(rootDir)) }
     }
 
-    val result = mutableListOf<Path>()
     Files.walkFileTree(
         rootDir,
         object : SimpleFileVisitor<Path>() {