diff --git a/env/merlin/spack.yaml b/env/merlin/spack.yaml
index 639f19b..8d55e3a 100644
--- a/env/merlin/spack.yaml
+++ b/env/merlin/spack.yaml
@@ -289,6 +289,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Batchsystem_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -319,6 +320,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *MPI_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -341,6 +343,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Compiler_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -404,6 +407,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Cuda_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -433,6 +437,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *EM_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -455,6 +460,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *HDF5_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -479,6 +485,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *HDF5_serial_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -508,6 +515,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Librairies_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -530,6 +538,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *MX_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -552,6 +561,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Programming_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -585,6 +595,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *System_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict:
@@ -607,6 +618,7 @@ spack:
       tcl:
         blacklist_implicits: true
         include: *Tools_pckgs
+        exclude: *All_pckgs
         all:
           autoload: direct
           conflict: