diff --git a/blacklist.csv b/blacklist.csv
deleted file mode 120000
index 0e88979..0000000
--- a/blacklist.csv
+++ /dev/null
@@ -1 +0,0 @@
-blacklists/blacklist.csv
\ No newline at end of file
diff --git a/config/config.yaml b/config/config.yaml
index 1d35535..0acad79 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -1,8 +1,7 @@
 folder_artifacts_nickel: "artifacts/nickel"
 folder_artifacts_json: "artifacts/json"
 folder_blacklists: "blacklists"
-symlink_blacklist: "blacklist.csv"
-system: "g5k" # can be "local" for local execution
+system: "local" # can be "local" for local execution
 prefix: "outputs"
 analysis_dir: "outputs/analysis"
 
diff --git a/config/default_config.yaml b/config/default_config.yaml
new file mode 100644
index 0000000..2a8472e
--- /dev/null
+++ b/config/default_config.yaml
@@ -0,0 +1,14 @@
+folder_artifacts_nickel: "artifacts/nickel"
+folder_artifacts_json: "artifacts/json"
+folder_blacklists: "blacklists"
+system: "g5k" # can be "local" for local execution
+prefix: "outputs"
+analysis_dir: "outputs/analysis"
+
+site: "grenoble"
+cluster: "dahu"
+max_duration: 60 # 1 hour
+checkpoint: 1 # 1 minute
+besteffort: True
+  #sleep_time: 300 # 5 minutes
+sleep_time: 30 # 0.5 minutes
diff --git a/workflow/Snakefile b/workflow/Snakefile
index d99a1f8..25253f8 100644
--- a/workflow/Snakefile
+++ b/workflow/Snakefile
@@ -9,13 +9,12 @@ DATE = datetime.datetime.now().strftime("%Y%m%d")
 ARTIFACTS_FOLDER_NICKEL = config["folder_artifacts_nickel"]
 ARTIFACTS_FOLDER_JSON   = config["folder_artifacts_json"]
 BLACKLIST_FOLDER = config["folder_blacklists"]
-BLACKLIST = config["symlink_blacklist"]
 EXTENSION = "json"
 SYSTEM = config["system"]
 PREFIX = config["prefix"]
 ANALYSIS_DIR = config["analysis_dir"]
 
-ARTIFACTS = get_artifacts_to_build(ARTIFACTS_FOLDER_NICKEL, BLACKLIST)
+ARTIFACTS = get_artifacts_to_build(ARTIFACTS_FOLDER_NICKEL, BLACKLIST_FOLDER)
 
 rule all:
   input:
@@ -72,7 +71,6 @@ rule run_ecg:
 
 rule update_blacklist:
   input:
-    BLACKLIST,
     build_status=expand(f"{PREFIX}/build_status/{{artifact}}/{{{{date}}}}.csv",\
                         artifact=ARTIFACTS
     )
@@ -80,7 +78,7 @@ rule update_blacklist:
     f"{BLACKLIST_FOLDER}/{{date}}.csv"
   shell:
     # We need to ignore lines where build is successful:
-    f"cat {{input}} | grep -v ',success' > {{output}} && rm -rf {BLACKLIST} && ln -s {{output}} {BLACKLIST}"
+    f"cat {{input}} | grep -v ',success' > {{output}}"
 
 rule analysis:
   input:
@@ -146,7 +144,7 @@ rule analysis_aggregate:
 # PLOT_HEADERS = {
 #   "sources_stats": ["dpkg", "rpm", "pacman", "pip", "conda", "git", "misc"],
 #   "pkgs_changes": ["dpkg", "rpm", "pacman", "pip", "conda", "git", "misc"],
-#   "build_status": ["success", "package_unavailable", "baseimage_unavailable", "artifact_unavailable", "dockerfile_not_found", "script_crash", "job_time_exceeded", "unknown_error"],
+#   "build_status": ["success", "package_install_failed", "baseimage_unavailable", "artifact_unavailable", "dockerfile_not_found", "script_crash", "job_time_exceeded", "unknown_error"],
 #   "artifact": ["available", "unavailable", "changed"]
 # }
 
diff --git a/workflow/utils.smk b/workflow/utils.smk
index a136bd8..5f4d568 100644
--- a/workflow/utils.smk
+++ b/workflow/utils.smk
@@ -1,15 +1,29 @@
 import csv
 import os
 
-def get_blacklisted_paths(blacklist_csv_path):
-  blacklisted = set()
-  with open(blacklist_csv_path, "r") as csv_file:
-    spamreader = csv.reader(csv_file, delimiter=",")
-    for row in spamreader:
-      blacklisted.add(row[0])
-  return blacklisted
+def find_last_blacklist(blacklist_dir_path):
+    last_blacklist = "0"
+    for blacklist in os.listdir(blacklist_dir_path):
+        if not os.path.isdir(blacklist):
+            # We want the latest one, so the one that has the most recent date
+            # as file name:
+            curbl_date = int(os.path.splitext(blacklist)[0])
+            lastbl_date = int(os.path.splitext(last_blacklist)[0])
+            if curbl_date > lastbl_date:
+                last_blacklist = blacklist
+    return last_blacklist
 
-def get_artifacts_to_build(artifacts_folder, blacklist_csv_path):
-  blacklisted = get_blacklisted_paths(blacklist_csv_path)
-  all_artifacts = set([a.split(".")[0] for a in os.listdir(artifacts_folder) if not os.path.isdir(os.path.join(artifacts_folder, a))])
-  return list(all_artifacts.difference(blacklisted))
+def get_blacklisted(blacklist_dir_path):
+    blacklisted = set()
+    if os.path.exists(blacklist_dir_path):
+        blacklist_csv_path = os.path.join(blacklist_dir_path, find_last_blacklist(blacklist_dir_path))
+        with open(blacklist_csv_path, "r") as csv_file:
+            spamreader = csv.reader(csv_file, delimiter=",")
+            for row in spamreader:
+                blacklisted.add(row[0])
+    return blacklisted
+
+def get_artifacts_to_build(artifacts_folder, blacklist_dir_path):
+    blacklisted = get_blacklisted(blacklist_dir_path)
+    all_artifacts = set([os.path.splitext(a)[0] for a in os.listdir(artifacts_folder) if not os.path.isdir(os.path.join(artifacts_folder, a))])
+    return list(all_artifacts.difference(blacklisted))