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-rw-r--r--doc/languages-frameworks/emscripten.section.md4
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/languages-frameworks/emscripten.section.md b/doc/languages-frameworks/emscripten.section.md
index ff622cfb0b501..5f93dd5ff3159 100644
--- a/doc/languages-frameworks/emscripten.section.md
+++ b/doc/languages-frameworks/emscripten.section.md
@@ -56,11 +56,11 @@ See the `zlib` example:
 
     zlib = (pkgs.zlib.override {
       stdenv = pkgs.emscriptenStdenv;
-    }).overrideDerivation
+    }).overrideAttrs
     (old: rec {
       buildInputs = old.buildInputs ++ [ pkg-config ];
       # we need to reset this setting!
-      NIX_CFLAGS_COMPILE="";
+      env = (old.env or { }) // { NIX_CFLAGS_COMPILE = ""; };
       configurePhase = ''
         # FIXME: Some tests require writing at $HOME
         HOME=$TMPDIR