diff --git a/pkgs/development/pharo/vm/build-vm-legacy.nix b/pkgs/development/pharo/vm/build-vm-legacy.nix
index bd5d1e91602..c00c92a6c33 100644
--- a/pkgs/development/pharo/vm/build-vm-legacy.nix
+++ b/pkgs/development/pharo/vm/build-vm-legacy.nix
@@ -13,6 +13,7 @@
 , alsaLib
 , cairo
 , libuuid
+, libnsl
 , makeWrapper
 , ... }:
 
@@ -29,7 +30,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ unzip cmake gcc makeWrapper ];
 
   buildInputs = [ bash glibc openssl libGLU libGL freetype
-                  xorg.libX11 xorg.libICE xorg.libSM alsaLib cairo pharo-share ];
+                  xorg.libX11 xorg.libICE xorg.libSM alsaLib cairo pharo-share libnsl ];
 
   LD_LIBRARY_PATH = lib.makeLibraryPath
     [ cairo libGLU libGL freetype openssl libuuid alsaLib
diff --git a/pkgs/development/pharo/vm/vms.nix b/pkgs/development/pharo/vm/vms.nix
index 77bc5b0682f..a8e3236a3a0 100644
--- a/pkgs/development/pharo/vm/vms.nix
+++ b/pkgs/development/pharo/vm/vms.nix
@@ -19,6 +19,7 @@
 , fetchFromGitHub
 , makeWrapper
 , runtimeShell
+, libnsl
 } @args:
 
 let