| LambdaCase | Language.Haskell.Extension, Distribution.Simple | 
| Language | Language.Haskell.Extension, Distribution.Simple | 
| languageToFlags | Distribution.Simple.Compiler, Distribution.Simple | 
| LaterVersion | Distribution.Version, Distribution.Simple | 
| laterVersion | Distribution.Version, Distribution.Simple | 
| ldOptions |  | 
| 1 (Function) | Distribution.PackageDescription | 
| 2 (Function) | Distribution.InstalledPackageInfo | 
| ldProgram | Distribution.Simple.Program.Builtin, Distribution.Simple.Program | 
| lessVerbose | Distribution.Verbosity | 
| LFlags | Distribution.Simple.Command | 
| LGPL | Distribution.License, Distribution.Make, Distribution.Simple | 
| LHC | Distribution.Compiler, Distribution.Simple.Compiler, Distribution.Simple | 
| lhcPkgProgram | Distribution.Simple.Program.Builtin, Distribution.Simple.Program | 
| lhcProgram | Distribution.Simple.Program.Builtin, Distribution.Simple.Program | 
| libAbiHash |  | 
| 1 (Function) | Distribution.Simple.GHC | 
| 2 (Function) | Distribution.Simple.GHCJS | 
| libBuildInfo | Distribution.PackageDescription | 
| LibComponentLocalBuildInfo | Distribution.Simple.LocalBuildInfo | 
| libdir | Distribution.Simple.InstallDirs, Distribution.Simple.LocalBuildInfo | 
| LibdirVar | Distribution.Simple.InstallDirs, Distribution.Simple.LocalBuildInfo | 
| LiberalTypeSynonyms | Language.Haskell.Extension, Distribution.Simple | 
| libexecdir | Distribution.Simple.InstallDirs, Distribution.Simple.LocalBuildInfo | 
| libExposed | Distribution.PackageDescription | 
| libFieldDescrs | Distribution.PackageDescription.Parse | 
| libModules | Distribution.PackageDescription | 
| Library |  | 
| 1 (Type/Class) | Distribution.PackageDescription | 
| 2 (Data Constructor) | Distribution.PackageDescription | 
| library | Distribution.PackageDescription | 
| libraryDirs | Distribution.InstalledPackageInfo | 
| LibraryName |  | 
| 1 (Type/Class) | Distribution.Simple.LocalBuildInfo | 
| 2 (Data Constructor) | Distribution.Simple.LocalBuildInfo | 
| libsubdir | Distribution.Simple.InstallDirs, Distribution.Simple.LocalBuildInfo | 
| LibsubdirVar | Distribution.Simple.InstallDirs, Distribution.Simple.LocalBuildInfo | 
| License | Distribution.License, Distribution.Make, Distribution.Simple | 
| license |  | 
| 1 (Function) | Distribution.PackageDescription | 
| 2 (Function) | Distribution.InstalledPackageInfo | 
| licenseFiles | Distribution.PackageDescription | 
| liftOption | Distribution.Simple.Command | 
| LineNo | Distribution.PackageDescription.Parse | 
| Linux | Distribution.System | 
| list | Distribution.Simple.Program.HcPkg | 
| listInvocation | Distribution.Simple.Program.HcPkg | 
| listPackageSources | Distribution.Simple.SrcDist | 
| listUnion | Distribution.Simple.Utils | 
| listUnionRight | Distribution.Simple.Utils | 
| Lit | Distribution.PackageDescription | 
| LocalBuildInfo |  | 
| 1 (Type/Class) | Distribution.Simple.LocalBuildInfo | 
| 2 (Data Constructor) | Distribution.Simple.LocalBuildInfo | 
| localBuildInfoFile | Distribution.Simple.Configure | 
| localPackageLog | Distribution.Simple.Test.Log | 
| localPkgDescr | Distribution.Simple.LocalBuildInfo | 
| locationPath | Distribution.Simple.Program.Types, Distribution.Simple.Program | 
| logFile | Distribution.Simple.Test.Log | 
| look | Distribution.Compat.ReadP | 
| lookupComponent | Distribution.Simple.LocalBuildInfo | 
| lookupDependency | Distribution.Simple.PackageIndex | 
| lookupInstalledPackageId | Distribution.Simple.PackageIndex | 
| lookupKnownProgram | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| lookupPackageId | Distribution.Simple.PackageIndex | 
| lookupPackageName | Distribution.Simple.PackageIndex | 
| lookupProgram | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| lookupProgramVersion | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| lookupRenaming | Distribution.PackageDescription | 
| lookupSourcePackageId | Distribution.Simple.PackageIndex | 
| LowerBound |  | 
| 1 (Type/Class) | Distribution.Version, Distribution.Simple | 
| 2 (Data Constructor) | Distribution.Version, Distribution.Simple | 
| lowercase | Distribution.Simple.Utils |