diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
index 267a0865f99f60..c7cfd27d3faa05 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/default.nix
@@ -58,7 +58,7 @@ let
     exec ${run} "$@"
   '';
 
-  bwrap_cmd = { init_args ? "" }: ''
+  bwrapCmd = { initArgs ? "" }: ''
     blacklist="/nix /dev /proc /etc"
     ro_mounts=""
     for i in ${env}/*; do
@@ -98,17 +98,17 @@ let
       ${etcBindFlags} \
       $ro_mounts \
       $auto_mounts \
-      ${init runScript}/bin/${name}-init ${init_args}
+      ${init runScript}/bin/${name}-init ${initArgs}
   '';
 
-  bin = writeShellScriptBin name (bwrap_cmd { init_args = ''"$@"''; });
+  bin = writeShellScriptBin name (bwrapCmd { initArgs = ''"$@"''; });
 
 in runCommandLocal name {
   inherit meta;
 
   passthru = passthru // {
     env = runCommandLocal "${name}-shell-env" {
-      shellHook = bwrap_cmd {};
+      shellHook = bwrapCmd {};
     } ''
       echo >&2 ""
       echo >&2 "*** User chroot 'env' attributes are intended for interactive nix-shell sessions, not for building! ***"
diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
index 08f58471bf02d0..8b2d46c4ae98ef 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
@@ -99,14 +99,14 @@ let
   };
 
   # setup library paths only for the targeted architecture
-  setupLibDirs_target = ''
+  setupLibDirsTarget = ''
     # link content of targetPaths
     cp -rsHf ${staticUsrProfileTarget}/lib lib
     ln -s lib lib${if is64Bit then "64" else "32"}
   '';
 
   # setup /lib, /lib32 and /lib64
-  setupLibDirs_multi = ''
+  setupLibDirsMulti = ''
     mkdir -m0755 lib32
     mkdir -m0755 lib64
     ln -s lib64 lib
@@ -124,8 +124,8 @@ let
     ln -Ls ${staticUsrProfileTarget}/lib/32/ld-linux.so.2 lib/
   '';
 
-  setupLibDirs = if isTargetBuild then setupLibDirs_target
-                                  else setupLibDirs_multi;
+  setupLibDirs = if isTargetBuild then setupLibDirsTarget
+                                  else setupLibDirsMulti;
 
   # the target profile is the actual profile that will be used for the chroot
   setupTargetProfile = ''