diff --git a/Makefile b/Makefile
index 2729856..ec1dd5c 100644
--- a/Makefile
+++ b/Makefile
@@ -25,10 +25,10 @@ full-auto: submodules-update upgrade clean optimise
 	@date
 
 optimise:
-	$(TIME) nix-store --optimise
+	$(TIME) nix optimise-store
 
 rebuild-build:
-	nix-channel --add https://nixos.org/channels/nixos-18.03 nixos
+	nix-channel --add https://nixos.org/channels/nixos-19.03 nixos
 	$(TIME) time nixos-rebuild build --fallback  --show-trace
 
 rebuild-switch:
@@ -51,7 +51,7 @@ store-repair:
 	$(TIME) nix-store --verify --check-contents --repair
 
 upgrade:
-	nix-channel --add https://nixos.org/channels/nixos-18.03 nixos
+	nix-channel --add https://nixos.org/channels/nixos-19.03 nixos
 	$(TIME) nixos-rebuild switch --upgrade --fallback --show-trace
 
 ##--------- Commandes spécifiques pour NixOS -- Opérations non courantes
diff --git a/applications/graphical/developpement-haskell.nix b/applications/graphical/developpement-haskell.nix
index 353322b..3257559 100644
--- a/applications/graphical/developpement-haskell.nix
+++ b/applications/graphical/developpement-haskell.nix
@@ -13,6 +13,6 @@ mkIf (flags.developpement-haskell && flags.graphical) {
   environment.systemPackages = with pkgs; [
   ] ++ (with pkgs.haskellPackages; [
     # Haskell lib
-    threadscope     # visualisation des threads (<bidule>.eventlog)
+    #threadscope     # visualisation des threads (<bidule>.eventlog)
   ]);
 }
diff --git a/applications/terminal/developpement-haskell.nix b/applications/terminal/developpement-haskell.nix
index fee92d8..ca2d451 100644
--- a/applications/terminal/developpement-haskell.nix
+++ b/applications/terminal/developpement-haskell.nix
@@ -19,7 +19,7 @@ mkIf flags.developpement-haskell {
   ] ++ (with pkgs.haskellPackages; [
     # Haskell lib
     autoproc              # ? procmail
-    brittany              # formatteur de code
+    #brittany              # formatteur de code
     darcs                 # gestionnaire de version éponyme
     #ghc-mod               # outil d'analyse de code haskell utilisé par IDE
     hindent               # indentation code
diff --git a/configuration/environment.nix b/configuration/environment.nix
index d20e764..8425cd6 100644
--- a/configuration/environment.nix
+++ b/configuration/environment.nix
@@ -12,7 +12,7 @@ in
   nix.buildCores = 0;
 
   # The NixOS release to be compatible with for stateful data such as databases.
-  system.stateVersion = "18.03";
+  system.stateVersion = "19.03";
 
   # copies the NixOS configuration file (usually /etc/nixos/configuration.nix) and links it from the resulting system (getting to /run/current-system/configuration.nix)
   system.copySystemConfiguration = true;
@@ -27,7 +27,7 @@ in
   boot.cleanTmpDir = true;
 
   # Activation des pages de manuel
-  programs.man.enable = true;
+  documentation.man.enable = true;
 
 
   # Paquets
diff --git a/configuration/u2f.nix b/configuration/u2f.nix
index 7898217..a52b369 100644
--- a/configuration/u2f.nix
+++ b/configuration/u2f.nix
@@ -33,7 +33,7 @@ mkIf true {
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", GROUP="audio", MODE="0666", SYMLINK+="rtl_sdr"
   '';
 
-  security.pam.enableU2F = true;
+  security.pam.u2f.enable = true;
 
   environment.systemPackages = with pkgs; [
     libu2f-host
diff --git a/services/docker.nix b/services/docker.nix
index 9663f89..95b96b4 100644
--- a/services/docker.nix
+++ b/services/docker.nix
@@ -13,7 +13,7 @@ mkIf flags.docker {
   environment.systemPackages = with pkgs; [
     # Ecosystème Docker
     docker
-    python36Packages.docker_compose
+    docker-compose
   ];
 
   virtualisation.docker.enable = true;
diff --git a/services/yubikey.nix b/services/yubikey.nix
index 2f786d7..3ca6d30 100644
--- a/services/yubikey.nix
+++ b/services/yubikey.nix
@@ -33,7 +33,7 @@ mkIf true {
     gnupg opensc pcsctools libu2f-host yubikey-personalization
   ];
 
-  security.pam.enableU2F = true;
+  security.pam.u2f.enable = true;
 
   /*users.extraUsers.joko = {
     isNormalUser = true;