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-rw-r--r--pkgs/development/compilers/openjdk/11.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/compilers/openjdk/11.nix b/pkgs/development/compilers/openjdk/11.nix
index 57911f2d58e6..e365b9b28b35 100644
--- a/pkgs/development/compilers/openjdk/11.nix
+++ b/pkgs/development/compilers/openjdk/11.nix
@@ -106,7 +106,7 @@ let
       # Set JAVA_HOME automatically.
       mkdir -p $out/nix-support
       cat <<EOF > $out/nix-support/setup-hook
-      if [ -z "\$JAVA_HOME" ]; then export JAVA_HOME=$out/lib/openjdk; fi
+      if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out/lib/openjdk; fi
       EOF
     '';