diff --git a/home-manager/default.nix b/home-manager/default.nix
index 943d61e8..394f0e7f 100644
--- a/home-manager/default.nix
+++ b/home-manager/default.nix
@@ -15,9 +15,7 @@ in
 pkgs.stdenv.mkDerivation {
   name = "home-manager";
 
-  phases = [ "installPhase" ];
-
-  installPhase = ''
+  buildCommand = ''
     install -v -D -m755 ${./home-manager} $out/bin/home-manager
 
     substituteInPlace $out/bin/home-manager \
diff --git a/modules/files.nix b/modules/files.nix
index 8871aa1a..11d0694b 100644
--- a/modules/files.nix
+++ b/modules/files.nix
@@ -264,9 +264,7 @@ in
     home-files = pkgs.stdenv.mkDerivation {
       name = "home-manager-files";
 
-      phases = [ "installPhase" ];
-
-      installPhase =
+      buildCommand =
         "mkdir -p $out\n" +
         concatStringsSep "\n" (
           mapAttrsToList (n: v:
diff --git a/modules/home-environment.nix b/modules/home-environment.nix
index 932f33f0..323294a3 100644
--- a/modules/home-environment.nix
+++ b/modules/home-environment.nix
@@ -283,9 +283,7 @@ in
         pkgs.stdenv.mkDerivation {
           name = "home-manager-generation";
 
-          phases = [ "installPhase" ];
-
-          installPhase = ''
+          buildCommand = ''
             mkdir -p $out
 
             cp ${activationScript} $out/activate