diff --git a/pkgs/development/compilers/ghc/8.10.1.nix b/pkgs/development/compilers/ghc/8.10.1.nix
index 2421e80bfbd9..cacff5bfcfdf 100644
--- a/pkgs/development/compilers/ghc/8.10.1.nix
+++ b/pkgs/development/compilers/ghc/8.10.1.nix
@@ -73,7 +73,7 @@ let
   '';
 
   # Splicer will pull out correct variations
-  libDeps = platform: stdenv.lib.optional enableTerminfo [ ncurses ]
+  libDeps = platform: stdenv.lib.optional enableTerminfo ncurses
     ++ [libffi]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
     ++ stdenv.lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
@@ -160,10 +160,10 @@ stdenv.mkDerivation (rec {
     "--with-system-libffi"
     "--with-ffi-includes=${targetPackages.libffi.dev}/include"
     "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && !enableIntegerSimple) [
+  ] ++ stdenv.lib.optionals (targetPlatform == hostPlatform && !enableIntegerSimple) [
     "--with-gmp-includes=${targetPackages.gmp.dev}/include"
     "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
+  ] ++ stdenv.lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
     "--with-iconv-includes=${libiconv}/include"
     "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
diff --git a/pkgs/development/compilers/ghc/8.8.2.nix b/pkgs/development/compilers/ghc/8.8.2.nix
index bf169a24c6a2..4cc41620c2db 100644
--- a/pkgs/development/compilers/ghc/8.8.2.nix
+++ b/pkgs/development/compilers/ghc/8.8.2.nix
@@ -73,7 +73,7 @@ let
   '';
 
   # Splicer will pull out correct variations
-  libDeps = platform: stdenv.lib.optional enableTerminfo [ ncurses ]
+  libDeps = platform: stdenv.lib.optional enableTerminfo ncurses
     ++ [libffi]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
     ++ stdenv.lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
@@ -160,10 +160,10 @@ stdenv.mkDerivation (rec {
     "--with-system-libffi"
     "--with-ffi-includes=${targetPackages.libffi.dev}/include"
     "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && !enableIntegerSimple) [
+  ] ++ stdenv.lib.optionals (targetPlatform == hostPlatform && !enableIntegerSimple) [
     "--with-gmp-includes=${targetPackages.gmp.dev}/include"
     "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
+  ] ++ stdenv.lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
     "--with-iconv-includes=${libiconv}/include"
     "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [