diff --git a/garlic/stages/broom.nix b/garlic/stages/broom.nix
deleted file mode 100644
index 6586170..0000000
--- a/garlic/stages/broom.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  stdenv
-}:
-
-{
-  program
-}:
-
-# This stage provides a clean environment to run experiments
-stdenv.mkDerivation {
-  name = "broom";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-
-    # Removes all environment variables
-    /usr/bin/env -i ${program}
-    EOF
-    chmod +x $out
-  '';
-}
diff --git a/garlic/stages/default.nix b/garlic/stages/default.nix
deleted file mode 100644
index f5d727e..0000000
--- a/garlic/stages/default.nix
+++ /dev/null
@@ -1,64 +0,0 @@
-{
-  pkgs
-, callPackage
-, callPackages
-}:
-
-let
-
-  garlic = {
-
-    # Load some helper functions to generate app variants
-    inherit (import ./gen.nix) genApps genApp genConfigs;
-
-    mpptest = callPackage ./mpptest { };
-
-    ppong = callPackage ./ppong {
-      mpi = pkgs.mpi;
-    };
-
-    nbody = callPackage ./nbody {
-      cc = pkgs.icc;
-      mpi = pkgs.impi;
-      tampi = pkgs.tampi;
-      gitBranch = "garlic/seq";
-    };
-
-    runWrappers = {
-      sbatch  = callPackage ./sbatch.nix { };
-      srun    = callPackage ./srun.nix { };
-      launch  = callPackage ./launcher.nix { };
-      control = callPackage ./control.nix { };
-      nixsetup= callPackage ./nix-setup.nix { };
-      argv    = callPackage ./argv.nix { };
-      statspy = callPackage ./statspy.nix { };
-      extrae  = callPackage ./extrae.nix { };
-      stagen  = callPackage ./stagen.nix { };
-    };
-
-    # Perf is tied to a linux kernel specific version
-    linuxPackages = pkgs.linuxPackages_4_4;
-    perfWrapper = callPackage ./perf.nix {
-      perf = pkgs.linuxPackages.perf;
-    };
-
-    exp = {
-      noise = callPackage ./exp/noise.nix { };
-      nbody = {
-        bs = callPackage ./exp/nbody/bs.nix {
-          pkgs = pkgs // garlic;
-        };
-        mpi = callPackage ./exp/nbody/mpi.nix { };
-      };
-      osu = rec {
-        latency-internode = callPackage ./exp/osu/latency.nix { };
-        latency-intranode = callPackage ./exp/osu/latency.nix {
-          interNode = false;
-        };
-        latency = latency-internode;
-      };
-    };
-  };
-
-in
-  garlic
diff --git a/garlic/stages/envRecord.nix b/garlic/stages/envRecord.nix
deleted file mode 100644
index 352162f..0000000
--- a/garlic/stages/envRecord.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  stdenv
-}:
-
-{
-  program
-}:
-
-stdenv.mkDerivation {
-  name = "envRecord";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-    
-    >&2 echo ----- ENV BEGIN -------
-    >&2 /usr/bin/env
-    >&2 echo ----- ENV END -------
-
-    exec ${program} \''${argv[@]}
-    EOF
-    chmod +x $out
-  '';
-}
diff --git a/garlic/stages/extrae.nix b/garlic/stages/extrae.nix
index 4d2db35..dabb31e 100644
--- a/garlic/stages/extrae.nix
+++ b/garlic/stages/extrae.nix
@@ -1,36 +1,34 @@
 {
   stdenv
-, bash
-#, writeShellScriptBin
+, garlicTools
 }:
 
 {
-  program
+  nextStage
 , configFile
 , traceLib
 , extrae
 }:
 
-#writeShellScriptBin "extraeWrapper" ''
-#  export EXTRAE_HOME=${extrae}
-#  export LD_PRELOAD=${extrae}/lib/lib${traceLib}trace.so:$LD_PRELOAD
-#  export EXTRAE_CONFIG_FILE=${configFile}
-#  exec ${program}
-#''
+with garlicTools;
 
-stdenv.mkDerivation {
-  name = "extrae";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-    
-    export EXTRAE_HOME=${extrae}
-    export LD_PRELOAD=${extrae}/lib/lib${traceLib}trace.so:$LD_PRELOAD
-    export EXTRAE_CONFIG_FILE=${configFile}
-    exec ${program}
-    EOF
-    chmod +x $out
-  '';
-}
+let
+  program = stageProgram nextStage;
+in
+  stdenv.mkDerivation {
+    name = "extrae";
+    phases = [ "installPhase" ];
+    preferLocalBuild = true;
+    dontPatchShebangs = true;
+    installPhase = ''
+      cat > $out <<EOF
+      #!/bin/sh
+      
+      export EXTRAE_HOME=${extrae}
+      export LD_PRELOAD=${extrae}/lib/lib${traceLib}trace.so:$LD_PRELOAD
+      export EXTRAE_CONFIG_FILE=${configFile}
+      exec ${program}
+      EOF
+      chmod +x $out
+    '';
+  }
diff --git a/garlic/stages/gen.nix b/garlic/stages/gen.nix
deleted file mode 100644
index 0c20f9c..0000000
--- a/garlic/stages/gen.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-let
-  lib = import <nixpkgs/lib>;
-
-  gen = rec {
-    # genAttrSets "a" ["hello" "world"]
-    # [ { a = "hello"; } { a = "world"; } ]
-    genAttrSets = (name: arr: (map (x: {${name}=x; })) arr);
-
-    # addAttrSets "a" [1 2] {e=4;}
-    # [ { a = 1; e = 4; } { a = 2; e = 4; } ]
-    addAttrSets = (name: arr: set: (map (x: set // {${name}=x; })) arr);
-
-    # attrToList {a=1;}
-    # [ { name = "a"; value = 1; } ]
-    attrToList = (set: map (name: {name=name; value=set.${name};} ) (builtins.attrNames set));
-
-    # mergeConfig [{e=1;}] {name="a"; value=[1 2]
-    # [ { a = 1; e = 1; } { a = 2; e = 1; } ]
-    mergeConfig = (arr: new: lib.flatten ( map (x: addAttrSets new.name new.value x) arr));
-
-    # genConfigs {a=[1 2]; b=[3 4];}
-    # [ { a = 1; b = 3; } { a = 1; b = 4; } { a = 2; b = 3; } { a = 2; b = 4; } ]
-    genConfigs = (config: lib.foldl mergeConfig [{}] (attrToList config));
-
-    # Generate multiple app versions by override with each config
-    genApp = (app: configs: map (conf: app.override conf // {conf=conf;}) configs);
-
-    # Generate app version from an array of apps
-    genApps = (apps: configs:
-      lib.flatten (map (app: genApp app configs) apps));
-
-  };
-in
-  gen
diff --git a/garlic/stages/nix-setup.nix b/garlic/stages/nix-setup.nix
deleted file mode 100644
index b340b19..0000000
--- a/garlic/stages/nix-setup.nix
+++ /dev/null
@@ -1,32 +0,0 @@
-{
-  stdenv
-}:
-
-{
-  program
-, nixsetup
-}:
-
-stdenv.mkDerivation {
-  name = "nixsetup";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  dontPatchShebangs = true;
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh -ex
-
-    >&2 echo Running nixsetup stage
-    env
-
-    # We need to enter the nix namespace first, in order to have /nix
-    # available, so we use this hack:
-    if [ ! -e /nix ]; then
-      exec ${nixsetup} \$0
-    fi
-
-    exec ${program}
-    EOF
-    chmod +x $out
-  '';
-}
diff --git a/garlic/stages/perf.nix b/garlic/stages/perf.nix
deleted file mode 100644
index 7518381..0000000
--- a/garlic/stages/perf.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-  stdenv
-, bash
-, perf
-}:
-
-{
-  program
-, perfArgs ? "record -a"
-}:
-
-stdenv.mkDerivation {
-  name = "perfWrapper";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-
-    exec ${perf}/bin/perf ${perfArgs} ${program}
-    EOF
-    chmod +x $out
-  '';
-}
diff --git a/garlic/stages/stagen.nix b/garlic/stages/stagen.nix
deleted file mode 100644
index d2cafd6..0000000
--- a/garlic/stages/stagen.nix
+++ /dev/null
@@ -1,55 +0,0 @@
-{
-  stdenv
-, bash
-, extrae
-, writeShellScriptBin
-, jq
-}:
-
-{
-  stages
-, conf
-, experimentName ? "run"
-}:
-
-with stdenv.lib;
-
-let
-
-  dStages = foldr (stageFn: {conf, prevStage, stages}: {
-    conf = conf;
-    prevStage = stageFn {stage=prevStage; conf=conf;};
-    stages = [ (stageFn {stage=prevStage; conf=conf;}) ] ++ stages;
-  })
-    {conf=conf; stages=[]; prevStage=null;} stages;
-
-  stageProgram = stage:
-    if stage ? programPath
-    then "${stage}${stage.programPath}" else "${stage}";
-
-  linkStages = imap1 (i: s: {
-    name = "${toString i}-${baseNameOf s.name}";
-    path = stageProgram s;
-  }) dStages.stages;
-
-  createLinks = builtins.concatStringsSep "\n"
-    (map (x: "ln -s ${x.path} $out/bin/${x.name}") linkStages);
-
-  firstStageLink = (x: x.name) (elemAt linkStages 0);
-in
-stdenv.mkDerivation {
-  name = "stagen";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  buildInputs = [ jq ];
-  installPhase = ''
-    mkdir -p $out/bin
-    ${createLinks}
-    ln -s ${firstStageLink} $out/bin/${experimentName}
-    cat > $out/config.raw << EOF
-    ${builtins.toJSON conf}
-    EOF
-    jq . $out/config.raw > $out/config.json
-    rm $out/config.raw
-  '';
-}
diff --git a/garlic/stages/statspy.nix b/garlic/stages/statspy.nix
deleted file mode 100644
index 93e6459..0000000
--- a/garlic/stages/statspy.nix
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  stdenv
-, bash
-}:
-
-{
-  program
-, outputDir ? "."
-}:
-
-stdenv.mkDerivation {
-  name = "statspy";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  programPath = "/bin/${name}";
-  installPhase = ''
-    mkdir -p $out/bin
-    cat > $out/bin/${name} <<EOF
-    #!/bin/sh
-
-    mkdir -p ${outputDir}
-    cat /proc/[0-9]*/stat | sort -n > ${outputDir}/statspy.\$(date +%s.%3N).begin
-    ${program}
-    cat /proc/[0-9]*/stat | sort -n > ${outputDir}/statspy.\$(date +%s.%3N).end
-
-    EOF
-    chmod +x $out/bin/${name}
-  '';
-}
diff --git a/garlic/stages/strace.nix b/garlic/stages/strace.nix
index 56eb932..22fb4a5 100644
--- a/garlic/stages/strace.nix
+++ b/garlic/stages/strace.nix
@@ -1,23 +1,29 @@
 {
   stdenv
-, bash
 , strace
+, garlicTools
 }:
 
 {
-  program
+  nextStage
 }:
 
-stdenv.mkDerivation {
-  name = "strace";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-    
-    exec ${strace}/bin/strace -f ${program}
-    EOF
-    chmod +x $out
-  '';
-}
+with garlicTools;
+
+let
+  program = stageProgram nextStage;
+in
+  stdenv.mkDerivation {
+    name = "strace";
+    phases = [ "installPhase" ];
+    preferLocalBuild = true;
+    dontPatchShebangs = true;
+    installPhase = ''
+      cat > $out <<EOF
+      #!/bin/sh
+      
+      exec ${strace}/bin/strace -f ${program}
+      EOF
+      chmod +x $out
+    '';
+  }
diff --git a/garlic/stages/valgrind.nix b/garlic/stages/valgrind.nix
index 5743206..9e156c0 100644
--- a/garlic/stages/valgrind.nix
+++ b/garlic/stages/valgrind.nix
@@ -1,23 +1,29 @@
 {
   stdenv
-, bash
 , valgrind
+, garlicTools
 }:
 
 {
-  program
+  nextStage
 }:
 
-stdenv.mkDerivation {
-  name = "valgrind";
-  preferLocalBuild = true;
-  phases = [ "installPhase" ];
-  installPhase = ''
-    cat > $out <<EOF
-    #!/bin/sh
-    
-    exec ${valgrind}/bin/valgrind ${program}
-    EOF
-    chmod +x $out
-  '';
-}
+with garlicTools;
+
+let
+  program = stageProgram nextStage;
+in
+  stdenv.mkDerivation {
+    name = "valgrind";
+    phases = [ "installPhase" ];
+    preferLocalBuild = true;
+    dontPatchShebangs = true;
+    installPhase = ''
+      cat > $out <<EOF
+      #!/bin/sh
+      
+      exec ${valgrind}/bin/valgrind ${program}
+      EOF
+      chmod +x $out
+    '';
+  }
diff --git a/overlay.nix b/overlay.nix
index fc91092..6280e65 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -207,16 +207,9 @@ let
       stages = {
         sbatch     = callPackage ./garlic/stages/sbatch.nix { };
         srun       = callPackage ./garlic/stages/srun.nix { };
-        launch     = callPackage ./garlic/stages/launcher { };
         control    = callPackage ./garlic/stages/control.nix { };
-        nixsetup   = callPackage ./garlic/stages/nix-setup.nix { };
         exec       = callPackage ./garlic/stages/exec.nix { };
-        statspy    = callPackage ./garlic/stages/statspy.nix { };
         extrae     = callPackage ./garlic/stages/extrae.nix { };
-        stagen     = callPackage ./garlic/stages/stagen.nix { };
-        perf       = callPackage ./garlic/stages/perf.nix { };
-        broom      = callPackage ./garlic/stages/broom.nix { };
-        envRecord  = callPackage ./garlic/stages/envRecord.nix { };
         valgrind   = callPackage ./garlic/stages/valgrind.nix { };
         isolate    = callPackage ./garlic/stages/isolate { };
         trebuchet  = callPackage ./garlic/stages/trebuchet.nix { };