diff --git a/python/python-external-index/src/com/intellij/python/externalIndex/PyExternalFilesIndexService.kt b/python/python-external-index/src/com/intellij/python/externalIndex/PyExternalFilesIndexService.kt
index e0bb16f25bec..c1ec34bbaf16 100644
--- a/python/python-external-index/src/com/intellij/python/externalIndex/PyExternalFilesIndexService.kt
+++ b/python/python-external-index/src/com/intellij/python/externalIndex/PyExternalFilesIndexService.kt
@@ -101,6 +101,13 @@ class PyExternalFilesIndexService(private val project: Project, private val coro
     }
   }
 
+  fun findSdkForExternallyIndexedFile(file: VirtualFile): Sdk? {
+    if (!isFileAddedToNonProjectIndex(file)) {
+      return null
+    }
+    return ProjectRootManager.getInstance(project).getProjectSdk()
+  }
+
   fun isFileAddedToNonProjectIndex(file: VirtualFile): Boolean {
     val virtualFileManager = project.workspaceModel.getVirtualFileUrlManager()
     val storage = project.workspaceModel.currentSnapshot
diff --git a/python/src/com/jetbrains/python/inspections/quickfix/InstallAllPackagesQuickFix.kt b/python/src/com/jetbrains/python/inspections/quickfix/InstallAllPackagesQuickFix.kt
index a82d8b6bd1fd..30a0c5da5f3a 100644
--- a/python/src/com/jetbrains/python/inspections/quickfix/InstallAllPackagesQuickFix.kt
+++ b/python/src/com/jetbrains/python/inspections/quickfix/InstallAllPackagesQuickFix.kt
@@ -4,7 +4,9 @@ package com.jetbrains.python.inspections.quickfix
 import com.intellij.codeInsight.intention.preview.IntentionPreviewInfo
 import com.intellij.codeInspection.LocalQuickFix
 import com.intellij.codeInspection.ProblemDescriptor
+import com.intellij.openapi.components.service
 import com.intellij.openapi.project.Project
+import com.intellij.python.externalIndex.PyExternalFilesIndexService
 import com.jetbrains.python.PyBundle
 import com.jetbrains.python.PyPsiPackageUtil.moduleToPackageName
 import com.jetbrains.python.packaging.management.ui.PythonPackageManagerUI
@@ -16,7 +18,9 @@ class InstallAllPackagesQuickFix(private val packageNames: List<String>) : Local
 
   override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
     val element = descriptor.psiElement ?: return
-    val sdk = PythonSdkUtil.findPythonSdk(element) ?: return
+    val sdk = PythonSdkUtil.findPythonSdk(element)
+              ?: project.service<PyExternalFilesIndexService>().findSdkForExternallyIndexedFile(descriptor.psiElement.containingFile.virtualFile)
+              ?: return
 
     val normalizedPackageNames = packageNames.map { moduleToPackageName(it) }
 
diff --git a/python/src/com/jetbrains/python/inspections/quickfix/InstallPackageQuickFix.kt b/python/src/com/jetbrains/python/inspections/quickfix/InstallPackageQuickFix.kt
index cdff82fd1f7d..264babdb545c 100644
--- a/python/src/com/jetbrains/python/inspections/quickfix/InstallPackageQuickFix.kt
+++ b/python/src/com/jetbrains/python/inspections/quickfix/InstallPackageQuickFix.kt
@@ -5,7 +5,9 @@ import com.intellij.codeInsight.intention.HighPriorityAction
 import com.intellij.codeInsight.intention.preview.IntentionPreviewInfo
 import com.intellij.codeInspection.LocalQuickFix
 import com.intellij.codeInspection.ProblemDescriptor
+import com.intellij.openapi.components.service
 import com.intellij.openapi.project.Project
+import com.intellij.python.externalIndex.PyExternalFilesIndexService
 import com.jetbrains.python.PyBundle
 import com.jetbrains.python.packaging.management.ui.PythonPackageManagerUI
 import com.jetbrains.python.packaging.utils.PyPackageCoroutine
@@ -18,7 +20,9 @@ internal open class InstallPackageQuickFix(open val packageName: String) : Local
   override fun getFamilyName(): @Nls String = PyBundle.message("python.unresolved.reference.inspection.install.package", packageName)
 
   override fun applyFix(project: Project, descriptor: ProblemDescriptor) {
-    val sdk = PythonSdkUtil.findPythonSdk(descriptor.psiElement) ?: return
+    val sdk = PythonSdkUtil.findPythonSdk(descriptor.psiElement)
+              ?: project.service<PyExternalFilesIndexService>().findSdkForExternallyIndexedFile(descriptor.psiElement.containingFile.virtualFile)
+              ?: return
     PyPackageCoroutine.launch(project) {
       PythonPackageManagerUI.forSdk(project, sdk).installWithConfirmation(listOf(packageName)) ?: return@launch
       onSuccess(descriptor)
diff --git a/python/src/com/jetbrains/python/inspections/unresolvedReference/PyUnresolvedReferencesInspection.kt b/python/src/com/jetbrains/python/inspections/unresolvedReference/PyUnresolvedReferencesInspection.kt
index 7df63434b956..ca477edfde35 100644
--- a/python/src/com/jetbrains/python/inspections/unresolvedReference/PyUnresolvedReferencesInspection.kt
+++ b/python/src/com/jetbrains/python/inspections/unresolvedReference/PyUnresolvedReferencesInspection.kt
@@ -10,6 +10,7 @@ import com.intellij.codeInspection.ProblemsHolder
 import com.intellij.codeInspection.options.OptPane
 import com.intellij.ide.projectView.actions.MarkRootsManager
 import com.intellij.lang.injection.InjectedLanguageManager
+import com.intellij.openapi.components.service
 import com.intellij.openapi.module.Module
 import com.intellij.openapi.module.ModuleUtilCore
 import com.intellij.openapi.project.Project
@@ -26,6 +27,7 @@ import com.intellij.psi.search.FilenameIndex
 import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.psi.util.QualifiedName
+import com.intellij.python.externalIndex.PyExternalFilesIndexService
 import com.intellij.python.pyproject.model.api.isPyProjectTomlBased
 import com.intellij.util.containers.ContainerUtil
 import com.jetbrains.python.PyNames
@@ -105,7 +107,7 @@ class PyUnresolvedReferencesInspection : PyUnresolvedReferencesInspectionBase()
       // Don't suggest installing "name" for `import pkg.name` or `from pkg.name import foo`.
       if (node !is PyReferenceExpression || node.isQualified) {
         return emptyList()
-      } 
+      }
 
       val qname = QualifiedName.fromDottedString(refName)
       val components = qname.components
@@ -114,14 +116,16 @@ class PyUnresolvedReferencesInspection : PyUnresolvedReferencesInspectionBase()
       }
       val packageName = PyPsiPackageUtil.moduleToPackageName(components[0])
 
+      val project = node.project
       val module = ModuleUtilCore.findModuleForPsiElement(node)
       val sdk = PythonSdkUtil.findPythonSdk(module)
-      if (module == null || sdk == null || !PyPackageUtil.packageManagementEnabled(sdk, false, true)) {
+                ?: project.service<PyExternalFilesIndexService>().findSdkForExternallyIndexedFile(node.containingFile.virtualFile)
+      if (sdk == null || !PyPackageUtil.packageManagementEnabled(sdk, false, true)) {
         return emptyList()
       }
 
 
-      val packageManager = PythonPackageManager.forSdk(module.project, sdk)
+      val packageManager = PythonPackageManager.forSdk(project, sdk)
 
       val shouldBeSuggest = !sdk.isReadOnly && packageManager.isNotInstalledAndCanBeInstalled(packageName)
       if (!shouldBeSuggest)