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-rw-r--r--pkgs/build-support/node/fetch-npm-deps/default.nix4
1 files changed, 3 insertions, 1 deletions
diff --git a/pkgs/build-support/node/fetch-npm-deps/default.nix b/pkgs/build-support/node/fetch-npm-deps/default.nix
index ac76758ba50..67a4c337c0d 100644
--- a/pkgs/build-support/node/fetch-npm-deps/default.nix
+++ b/pkgs/build-support/node/fetch-npm-deps/default.nix
@@ -165,7 +165,9 @@
 
       dontInstall = true;
 
-      impureEnvVars = lib.fetchers.proxyImpureEnvVars;
+      # NIX_NPM_TOKENS environment variable should be a JSON mapping in the shape of:
+      # `{ "registry.example.com": "example-registry-bearer-token", ... }`
+      impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ [ "NIX_NPM_TOKENS" ];
 
       SSL_CERT_FILE = if (hash_.outputHash == "" || hash_.outputHash == lib.fakeSha256 || hash_.outputHash == lib.fakeSha512 || hash_.outputHash == lib.fakeHash)
         then "${cacert}/etc/ssl/certs/ca-bundle.crt"