Index: ghc-8.4.3/libraries/Cabal/Cabal/Distribution/System.hs
===================================================================
--- ghc-8.4.3.orig/libraries/Cabal/Cabal/Distribution/System.hs
+++ ghc-8.4.3/libraries/Cabal/Cabal/Distribution/System.hs
@@ -157,7 +157,7 @@ buildOS = classifyOS Permissive System.I
 --
 -- The following aliases can also be used:
 --    * PPC alias: powerpc
---    * PPC64 alias : powerpc64
+--    * PPC64 alias : powerpc64, powerpc64le
 --    * Sparc aliases: sparc64, sun4
 --    * Mips aliases: mipsel, mipseb
 --    * Arm aliases: armeb, armel
@@ -187,7 +187,7 @@ archAliases :: ClassificationStrictness
 archAliases Strict _     = []
 archAliases Compat _     = []
 archAliases _      PPC   = ["powerpc"]
-archAliases _      PPC64 = ["powerpc64"]
+archAliases _      PPC64 = ["powerpc64", "powerpc64le"]
 archAliases _      Sparc = ["sparc64", "sun4"]
 archAliases _      Mips  = ["mipsel", "mipseb"]
 archAliases _      Arm   = ["armeb", "armel"]