diff --git a/env/merlin/sysconfigs/packages.yaml b/env/merlin/sysconfigs/packages.yaml
index 5913dc0..1c3cae0 100644
--- a/env/merlin/sysconfigs/packages.yaml
+++ b/env/merlin/sysconfigs/packages.yaml
@@ -21,21 +21,6 @@ packages:
         - intel-mkl
     target:
       - haswell
-  autoconf:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: autoconf@2.69
-  automake:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: automake@1.13.4
-  binutils:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: binutils@2.27.44
   bzip2:
     buildable: false
     externals:
@@ -215,16 +200,6 @@ packages:
     externals:
       - prefix: /usr
         spec: libxt@6.0.0
-  lz4:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: lz4@1.9.3
-  m4:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: m4@1.4.16
   # E.G: only available from already downloaded source, so I put it here
   mxm:
     buildable: false 
@@ -261,10 +236,6 @@ packages:
     externals:
       - prefix: /usr
         spec: pkg-config@0.27.1
-  python:
-    externals:
-      - prefix: /usr
-        spec: python@2.7.5
   rsync:
     buildable: false
     externals:
@@ -299,14 +270,4 @@ packages:
     buildable: false
     externals:
       - prefix: /usr
-        spec: xerces-c@3.1
-  xz:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: xz@5.2.2
-  zlib:
-    buildable: false
-    externals:
-      - prefix: /usr
-        spec: zlib@1.2.7
\ No newline at end of file
+        spec: xerces-c@3.1
\ No newline at end of file