diff --git a/src/lake/Lake/Load/Resolve.lean b/src/lake/Lake/Load/Resolve.lean
index d56f4bc79848..fcbd367c38e7 100644
--- a/src/lake/Lake/Load/Resolve.lean
+++ b/src/lake/Lake/Load/Resolve.lean
@@ -146,7 +146,7 @@ Also, move the packages directory if its location has changed.
 -/
 private def reuseManifest
   (ws : Workspace) (toUpdate : NameSet)
-: UpdateT LogIO PUnit := do
+: UpdateT LoggerIO PUnit := do
   let rootName := ws.root.name.toString (escape := false)
   match (← Manifest.load ws.manifestFile |>.toBaseIO) with
   | .ok manifest =>
@@ -174,7 +174,7 @@ private def reuseManifest
     logWarning s!"{rootName}: ignoring previous manifest because it failed to load: {e}"
 
 /-- Add a package dependency's manifest entries to the update state. -/
-private def addDependencyEntries (pkg : Package) : UpdateT LogIO PUnit := do
+private def addDependencyEntries (pkg : Package) : UpdateT LoggerIO PUnit := do
   match (← Manifest.load pkg.manifestFile |>.toBaseIO) with
   | .ok manifest =>
     manifest.packages.forM fun entry => do
@@ -189,7 +189,7 @@ private def addDependencyEntries (pkg : Package) : UpdateT LogIO PUnit := do
 /-- Materialize a single dependency, updating it if desired. -/
 private def updateAndMaterializeDep
   (ws : Workspace) (pkg : Package) (dep : Dependency)
-: UpdateT LogIO MaterializedDep := do
+: UpdateT LoggerIO MaterializedDep := do
   if let some entry ← fetch? dep.name then
     entry.materialize ws.lakeEnv ws.dir ws.relPkgsDir
   else
@@ -210,7 +210,7 @@ private def updateAndMaterializeDep
 /-- Verify that a dependency was loaded with the correct name. -/
 private def validateDep
   (pkg : Package) (dep : Dependency) (matDep : MaterializedDep) (depPkg : Package)
-: LogIO PUnit := do
+: LoggerIO PUnit := do
   if depPkg.name ≠ dep.name then
     if dep.name = .mkSimple "std" then
       let rev :=
@@ -352,7 +352,7 @@ where
   @[inline] updateAndLoadDep pkg dep := do
     let matDep ← updateAndMaterializeDep (← getWorkspace) pkg dep
     loadUpdatedDep pkg dep matDep
-  @[inline] loadUpdatedDep pkg dep matDep : StateT Workspace (UpdateT LogIO) Package  := do
+  @[inline] loadUpdatedDep pkg dep matDep : StateT Workspace (UpdateT LoggerIO) Package  := do
     let depPkg ← loadDepPackage matDep dep.opts leanOpts true
     validateDep pkg dep matDep depPkg
     addDependencyEntries depPkg
@@ -361,7 +361,7 @@ where
 /-- Write package entries to the workspace manifest. -/
 def Workspace.writeManifest
   (ws : Workspace) (entries : NameMap PackageEntry)
-: LogIO PUnit := do
+: IO PUnit := do
   let manifestEntries := ws.packages.foldl (init := #[]) fun arr pkg =>
     match entries.find? pkg.name with
     | some entry => arr.push <|
@@ -376,7 +376,7 @@ def Workspace.writeManifest
   manifest.saveToFile ws.manifestFile
 
 /-- Run a package's `post_update` hooks. -/
-def Package.runPostUpdateHooks (pkg : Package) : LakeT LogIO PUnit := do
+def Package.runPostUpdateHooks (pkg : Package) : LakeT LoggerIO PUnit := do
   unless pkg.postUpdateHooks.isEmpty do
   logInfo s!"{pkg.name}: running post-update hooks"
   pkg.postUpdateHooks.forM fun hook => hook.get.fn pkg
@@ -405,7 +405,7 @@ reporting warnings and/or errors as appropriate.
 -/
 def validateManifest
   (pkgEntries : NameMap PackageEntry) (deps : Array Dependency)
-: LogIO PUnit := do
+: LoggerIO PUnit := do
   if pkgEntries.isEmpty && !deps.isEmpty then
     error "missing manifest; use `lake update` to generate one"
   deps.forM fun dep => do
@@ -429,7 +429,7 @@ downloading and/or updating them as necessary.
 def Workspace.materializeDeps
   (ws : Workspace) (manifest : Manifest)
   (leanOpts : Options := {}) (reconfigure := false)
-: LogIO Workspace := do
+: LoggerIO Workspace := do
   if !manifest.packages.isEmpty && manifest.packagesDir? != some (mkRelPathString ws.relPkgsDir) then
     logWarning <|
       "manifest out of date: packages directory changed; \