diff --git a/pkgs/development/compilers/ghc/7.10.3.nix b/pkgs/development/compilers/ghc/7.10.3.nix
index 0d446baae821..4a30d052fc7f 100644
--- a/pkgs/development/compilers/ghc/7.10.3.nix
+++ b/pkgs/development/compilers/ghc/7.10.3.nix
@@ -57,7 +57,7 @@ let
   # Splicer will pull out correct variations
   libDeps = platform: [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (platform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (platform.libc != "glibc") libiconv;
 
   toolsForTarget =
     if hostPlatform == buildPlatform then
@@ -105,7 +105,7 @@ stdenv.mkDerivation rec {
     "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && ! enableIntegerSimple) [
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.isDarwin) [
+  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc") [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
     "--enable-bootstrap-with-devel-snapshot"
diff --git a/pkgs/development/compilers/ghc/7.8.4.nix b/pkgs/development/compilers/ghc/7.8.4.nix
index c49f10268731..eb7e7166765f 100644
--- a/pkgs/development/compilers/ghc/7.8.4.nix
+++ b/pkgs/development/compilers/ghc/7.8.4.nix
@@ -17,7 +17,7 @@ let
     libraries/terminfo_CONFIGURE_OPTS += --configure-option=--with-curses-includes="${ncurses.dev}/include"
     libraries/terminfo_CONFIGURE_OPTS += --configure-option=--with-curses-libraries="${ncurses.out}/lib"
     DYNAMIC_BY_DEFAULT = NO
-    ${stdenv.lib.optionalString stdenv.isDarwin ''
+    ${stdenv.lib.optionalString (stdenv.hostPlatform.libc != "glibc") ''
       libraries/base_CONFIGURE_OPTS += --configure-option=--with-iconv-includes="${libiconv}/include"
       libraries/base_CONFIGURE_OPTS += --configure-option=--with-iconv-libraries="${libiconv}/lib"
     ''}
@@ -31,7 +31,7 @@ let
   # Splicer will pull out correct variations
   libDeps = [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (stdenv.hostPlatform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (stdenv.hostPlatform.libc != "glibc") libiconv;
 
 in
 
diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index b1870908927a..d72b70b2e4a9 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -51,7 +51,7 @@ let
   # Splicer will pull out correct variations
   libDeps = platform: [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (platform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (platform.libc != "glibc") libiconv;
 
   toolsForTarget =
     if hostPlatform == buildPlatform then
@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
     "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && ! enableIntegerSimple) [
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.isDarwin) [
+  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc") [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
     "--enable-bootstrap-with-devel-snapshot"
diff --git a/pkgs/development/compilers/ghc/8.2.2.nix b/pkgs/development/compilers/ghc/8.2.2.nix
index 336d37bdb9fc..d81d87508072 100644
--- a/pkgs/development/compilers/ghc/8.2.2.nix
+++ b/pkgs/development/compilers/ghc/8.2.2.nix
@@ -56,7 +56,7 @@ let
   # Splicer will pull out correct variations
   libDeps = platform: [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (platform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (platform.libc != "glibc") libiconv;
 
   toolsForTarget =
     if hostPlatform == buildPlatform then
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && ! enableIntegerSimple) [
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.isDarwin) [
+  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc") [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
     "--enable-bootstrap-with-devel-snapshot"
diff --git a/pkgs/development/compilers/ghc/8.4.1.nix b/pkgs/development/compilers/ghc/8.4.1.nix
index dc71139d2189..b91faa9db62f 100644
--- a/pkgs/development/compilers/ghc/8.4.1.nix
+++ b/pkgs/development/compilers/ghc/8.4.1.nix
@@ -57,7 +57,7 @@ let
   # Splicer will pull out correct variations
   libDeps = platform: [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (platform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (platform.libc != "glibc") libiconv;
 
   toolsForTarget =
     if hostPlatform == buildPlatform then
@@ -105,7 +105,7 @@ stdenv.mkDerivation rec {
     "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && ! enableIntegerSimple) [
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.isDarwin) [
+  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc") [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
     "--enable-bootstrap-with-devel-snapshot"
diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 466bccc18b33..bf23272156f3 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -57,7 +57,7 @@ let
   # Splicer will pull out correct variations
   libDeps = platform: [ ncurses ]
     ++ stdenv.lib.optional (!enableIntegerSimple) gmp
-    ++ stdenv.lib.optional (platform.libc == "libSystem") libiconv;
+    ++ stdenv.lib.optional (platform.libc != "glibc") libiconv;
 
   toolsForTarget =
     if hostPlatform == buildPlatform then
@@ -105,7 +105,7 @@ stdenv.mkDerivation rec {
     "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && ! enableIntegerSimple) [
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
-  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.isDarwin) [
+  ] ++ stdenv.lib.optional (targetPlatform == hostPlatform && hostPlatform.libc != "glibc") [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
   ] ++ stdenv.lib.optionals (targetPlatform != hostPlatform) [
     "--enable-bootstrap-with-devel-snapshot"