Run each experiment in a unique directory

bsc/garlic/launcher.nix

@@ -0,0 +1,33 @@
+{
+  stdenv
+}:
+
+apps:
+
+stdenv.mkDerivation {
+  name = "launcher";
+  preferLocalBuild = true;
+
+  buildInputs = [] ++ apps;
+  apps = apps;
+  phases = [ "installPhase" ];
+  dontPatchShebangs = true;
+
+  installPhase = ''
+    mkdir -p $out/apps
+    for j in $apps; do
+      ln -s $j $out/apps/$(basename $j)
+    done
+
+    mkdir -p $out/bin
+    cat > $out/bin/run <<EOF
+    #!/bin/sh
+
+    for j in $out/apps/*; do
+      \$j/bin/run
+    done
+    EOF
+
+    chmod +x $out/bin/run
+  '';
+}