stdenv: remove .attrs.sh fallback for structuredAttrs

This was eventually fixed in Nix 2.16+. More discussion in #357053.

pkgs/build-support/testers/expect-failure.sh

@@ -41,7 +41,7 @@ echo "testBuildFailure: Original builder produced exit code: $r"
 #
 # NOTE: This MUST be done after the original builder has finished!
 #       Otherwise we could pollute its environment.
-if [ -e "${NIX_ATTRS_SH_FILE:-}" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
+if [ -e "${NIX_ATTRS_SH_FILE:-}" ]; then . "$NIX_ATTRS_SH_FILE"; fi
 
 # Variables injected by replaceVars
 #

pkgs/stdenv/generic/make-derivation.nix

@@ -847,7 +847,7 @@ let
               "-c"
               ''
                 out="${placeholder "out"}"
-                if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
+                if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; fi
                 declare -p > $out
                 for var in $passAsFile; do
                     pathVar="''${var}Path"

pkgs/stdenv/generic/setup.sh

@@ -25,7 +25,7 @@ if [[ ${NIX_DEBUG:-0} -ge 6 ]]; then
     set -x
 fi
 
-if [ -f .attrs.sh ] || [[ -n "${NIX_ATTRS_JSON_FILE:-}" ]]; then
+if [[ -n "${NIX_ATTRS_JSON_FILE:-}" ]]; then
     __structuredAttrs=1
     echo "structuredAttrs is enabled"
 
@@ -33,16 +33,6 @@ if [ -f .attrs.sh ] || [[ -n "${NIX_ATTRS_JSON_FILE:-}" ]]; then
         # ex: out=/nix/store/...
         export "$outputName=${outputs[$outputName]}"
     done
-
-    # $NIX_ATTRS_JSON_FILE pointed to the wrong location in sandbox
-    # https://github.com/NixOS/nix/issues/6736; please keep around until the
-    # fix reaches *every patch version* that's >= lib/minver.nix
-    if ! [[ -e "${NIX_ATTRS_JSON_FILE:-}" ]]; then
-        export NIX_ATTRS_JSON_FILE="$NIX_BUILD_TOP/.attrs.json"
-    fi
-    if ! [[ -e "${NIX_ATTRS_SH_FILE:-}" ]]; then
-        export NIX_ATTRS_SH_FILE="$NIX_BUILD_TOP/.attrs.sh"
-    fi
 else
     __structuredAttrs=
     : "${outputs:=out}"

pkgs/stdenv/generic/source-stdenv.sh

@@ -1,3 +1,3 @@
-if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; elif [ -f .attrs.sh ]; then . .attrs.sh; fi
+if [ -e "$NIX_ATTRS_SH_FILE" ]; then . "$NIX_ATTRS_SH_FILE"; fi
 source "$stdenv/setup"
 source "$1"