diff --git a/pkgs/by-name/bc/bcachefs-tools/package.nix b/pkgs/by-name/bc/bcachefs-tools/package.nix
index 2c1ac93181b4..1963233ec231 100644
--- a/pkgs/by-name/bc/bcachefs-tools/package.nix
+++ b/pkgs/by-name/bc/bcachefs-tools/package.nix
@@ -70,6 +70,10 @@ stdenv.mkDerivation (finalAttrs: {
     "PREFIX=${placeholder "out"}"
     "VERSION=${finalAttrs.version}"
     "INITRAMFS_DIR=${placeholder "out"}/etc/initramfs-tools"
+
+    # Tries to install to the 'systemd-minimal' and 'udev' nix installation paths
+    "PKGCONFIG_SERVICEDIR=$(out)/lib/systemd/system"
+    "PKGCONFIG_UDEVDIR=$(out)/lib/udev"
   ] ++ lib.optional fuseSupport "BCACHEFS_FUSE=1";
 
   env = {
@@ -90,12 +94,6 @@ stdenv.mkDerivation (finalAttrs: {
   '';
   checkFlags = [ "BCACHEFS_TEST_USE_VALGRIND=no" ];
 
-  # Tries to install to the 'systemd-minimal' and 'udev' nix installation paths
-  installFlags = [
-    "PKGCONFIG_SERVICEDIR=$(out)/lib/systemd/system"
-    "PKGCONFIG_UDEVDIR=$(out)/lib/udev"
-  ];
-
   postInstall =
     ''
       substituteInPlace $out/libexec/bcachefsck_all \