Update default.nix

Author: angerman

compiler/ghc/default.nix

@@ -328,7 +328,7 @@ let
       # iPhones/iPads/... won't understand the compiled code, as the compiler will emit LDSETALH
       # FIXME: we should have iOS as an argument to this derivation, and then make this, as well as
       #        disableLargeAddress space conditional on iOS = true.
-      + lib.optionalString (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) "'*.rts.ghc.c.opts += -optc-mcpu=apple-a7 -optc-march=armv8-a+norcpc'"
+      + lib.optionalString (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) " '*.rts.ghc.c.opts += -optc-mcpu=apple-a7 -optc-march=armv8-a+norcpc'"
       # For GHC versions in the 9.x range that don't support the +native_bignum flavour transformer yet
       + lib.optionalString ((enableNativeBignum && !hadrianHasNativeBignumFlavour))
         " --bignum=native"