| X11 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| X86_64 | Distribution.System | 
| xargs | Distribution.Simple.Utils | 
| XdgCache | System.Directory.Internal, System.Directory | 
| XdgConfig | System.Directory.Internal, System.Directory | 
| XdgConfigDirs | System.Directory.Internal, System.Directory | 
| XdgData | System.Directory.Internal, System.Directory | 
| XdgDataDirs | System.Directory.Internal, System.Directory | 
| XdgDirectory | System.Directory.Internal, System.Directory | 
| XdgDirectoryList | System.Directory.Internal, System.Directory | 
| Xerox | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| XFree86_1_1 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| Xinetd | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| XmlSyntax | Language.Haskell.Extension, Distribution.Simple | 
| Xnet | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| xor |  | 
| 1 (Function) | Data.List.NonEmpty | 
| 2 (Function) | Data.Bits, Foreign, Foreign.Safe | 
| xor# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| xorBigNat | GHC.Integer.GMP.Internals | 
| xorI# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| xorInteger |  | 
| 1 (Function) | GHC.Integer | 
| 2 (Function) | GHC.Integer.GMP.Internals | 
| xorNatural | GHC.Natural | 
| Xpp | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| XSkat | Distribution.SPDX.LicenseId, Distribution.SPDX |