glibc-multi: fix with multiple outputs

pkgs/development/libraries/glibc/multi.nix

@@ -3,32 +3,26 @@
 
 let
   nameVersion = builtins.parseDrvName glibc.name;
+  glibc64 = glibc;
 in
 runCommand "${nameVersion.name}-multi-${nameVersion.version}"
-  { inherit glibc32;
-   glibc64 = glibc;
-  }
+  { outputs = [ "dev" "out" "bin" ]; } # TODO: no static version here (yet)
   ''
-    mkdir -p $out
-    ln -s $glibc64/* $out/
-
-    rm $out/lib $out/lib64
-    mkdir -p $out/lib
-    ln -s $glibc64/lib/* $out/lib
-    ln -s $glibc32/lib $out/lib/32
-    ln -s lib $out/lib64
+    mkdir -p "$out/lib"
+    ln -s '${glibc64.out}'/lib/* "$out/lib"
+    ln -s '${glibc32.out}/lib' "$out/lib/32"
+    ln -s lib "$out/lib64"
 
     # fixing ldd RLTDLIST
-    rm $out/bin
-    cp -rs $glibc64/bin $out
-    chmod u+w $out/bin
-    rm $out/bin/ldd
+    mkdir -p "$bin/bin"
+    cp -s '${glibc64.bin}'/bin/* "$bin/bin/"
+    rm "$bin/bin/ldd"
     sed -e "s|^RTLDLIST=.*$|RTLDLIST=\"$out/lib/ld-linux-x86-64.so.2 $out/lib/32/ld-linux.so.2\"|g" \
-        $glibc64/bin/ldd > $out/bin/ldd
-    chmod 555 $out/bin/ldd
+        '${glibc64.bin}/bin/ldd' > "$bin/bin/ldd"
+    chmod +x "$bin/bin/ldd"
 
-    rm $out/include
-    cp -rs $glibc32/include $out
-    chmod -R u+w $out/include
-    cp -rsf $glibc64/include $out
+    mkdir "$dev"
+    cp -rs '${glibc32}'/include "$dev/"
+    chmod +w -R "$dev"
+    cp -rsf '${glibc64}'/include "$dev/"
   ''