diff --git a/nixos/modules/config/networking.nix b/nixos/modules/config/networking.nix
index dd36696b94d..03944de8249 100644
--- a/nixos/modules/config/networking.nix
+++ b/nixos/modules/config/networking.nix
@@ -197,7 +197,7 @@ in
 
       } // optionalAttrs (pkgs.stdenv.hostPlatform.libc == "glibc") {
         # /etc/rpc: RPC program numbers.
-        rpc.source = pkgs.glibc.out + "/etc/rpc";
+        rpc.source = pkgs.stdenv.cc.libc.out + "/etc/rpc";
       };
 
       networking.proxy.envVars =
diff --git a/nixos/modules/services/system/nscd.nix b/nixos/modules/services/system/nscd.nix
index e11f7e049d8..af26dd84707 100644
--- a/nixos/modules/services/system/nscd.nix
+++ b/nixos/modules/services/system/nscd.nix
@@ -7,6 +7,10 @@ let
   nssModulesPath = config.system.nssModules.path;
   cfg = config.services.nscd;
 
+  nscd = if pkgs.stdenv.hostPlatform.libc == "glibc"
+         then pkgs.stdenv.cc.libc.bin
+         else pkgs.glibc.bin;
+
 in
 
 {
@@ -59,16 +63,16 @@ in
         # files. So prefix the ExecStart command with "!" to prevent systemd
         # from dropping privileges early. See ExecStart in systemd.service(5).
         serviceConfig =
-          { ExecStart = "!@${pkgs.glibc.bin}/sbin/nscd nscd";
+          { ExecStart = "!@${nscd}/sbin/nscd nscd";
             Type = "forking";
             DynamicUser = true;
             RuntimeDirectory = "nscd";
             PIDFile = "/run/nscd/nscd.pid";
             Restart = "always";
             ExecReload =
-              [ "${pkgs.glibc.bin}/sbin/nscd --invalidate passwd"
-                "${pkgs.glibc.bin}/sbin/nscd --invalidate group"
-                "${pkgs.glibc.bin}/sbin/nscd --invalidate hosts"
+              [ "${nscd}/sbin/nscd --invalidate passwd"
+                "${nscd}/sbin/nscd --invalidate group"
+                "${nscd}/sbin/nscd --invalidate hosts"
               ];
           };
       };
diff --git a/pkgs/top-level/unix-tools.nix b/pkgs/top-level/unix-tools.nix
index 56bab2fe411..cdad9de61f4 100644
--- a/pkgs/top-level/unix-tools.nix
+++ b/pkgs/top-level/unix-tools.nix
@@ -66,12 +66,12 @@ let
       linux = pkgs.utillinux;
     };
     getconf = {
-      linux = if stdenv.hostPlatform.libc == "glibc" then pkgs.glibc
+      linux = if stdenv.hostPlatform.libc == "glibc" then pkgs.stdenv.cc.libc
               else pkgs.netbsd.getconf;
       darwin = pkgs.darwin.system_cmds;
     };
     getent = {
-      linux = if stdenv.hostPlatform.libc == "glibc" then pkgs.glibc
+      linux = if stdenv.hostPlatform.libc == "glibc" then pkgs.stdenv.cc.libc
               else pkgs.netbsd.getent;
       darwin = pkgs.netbsd.getent;
     };