diff --git a/stacks/pinot-noir-gcc/packages_stack.yaml b/stacks/pinot-noir-gcc/packages_stack.yaml
index d12a3aa85defa2721cc41fe5bb6811632456b7d7..65bebbff72b75fc05be003c6c16492fbf27e07a0 100644
--- a/stacks/pinot-noir-gcc/packages_stack.yaml
+++ b/stacks/pinot-noir-gcc/packages_stack.yaml
@@ -6,9 +6,6 @@ packages:
       jpeg: [libjpeg]
       zlib-api: [zlib-ng]
     require:
-      - spec: "^libiconv"
-        when: "^iconv"
-
       - spec: '+ipo'
         when: '%gcc'
 
@@ -133,9 +130,6 @@ packages:
     require:
     - spec: '+rdmacm +rc +dc +ud +cma +verbs'
 
-  zlib-ng:
-    require: ['build_system=autotools']
-
   # ----------------------------------------------------------------------------
   # System dependencies
   # ----------------------------------------------------------------------------