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-rw-r--r--pkgs/tools/networking/ferm/default.nix4
-rw-r--r--pkgs/tools/networking/ferm/import-ferm-wrapped.patch14
2 files changed, 18 insertions, 0 deletions
diff --git a/pkgs/tools/networking/ferm/default.nix b/pkgs/tools/networking/ferm/default.nix
index 63f247ab986b3..e14b3f8572b83 100644
--- a/pkgs/tools/networking/ferm/default.nix
+++ b/pkgs/tools/networking/ferm/default.nix
@@ -11,6 +11,10 @@ in stdenv.mkDerivation rec {
     sha256 = "sha256-wA2RDVOU5pZ1YI617g9QTVz9pB6ZCi2akbqsbfk+P5I=";
   };
 
+  patches = [
+    ./import-ferm-wrapped.patch
+  ];
+
   # perl is used at build time to gather the ferm version.
   nativeBuildInputs = [ makeWrapper perl ];
   buildInputs = [ perl ];
diff --git a/pkgs/tools/networking/ferm/import-ferm-wrapped.patch b/pkgs/tools/networking/ferm/import-ferm-wrapped.patch
new file mode 100644
index 0000000000000..3975c79af8868
--- /dev/null
+++ b/pkgs/tools/networking/ferm/import-ferm-wrapped.patch
@@ -0,0 +1,14 @@
+--- old/src/import-ferm
++++ new/src/import-ferm
+@@ -42,9 +42,9 @@
+     # find the main "ferm" program
+     my $ferm;
+     if ($0 =~ /^(.*)\//) {
+-        $ferm = "$1/ferm";
++        $ferm = "$1/.ferm-wrapped";
+     } else {
+-        $ferm = 'ferm';
++        $ferm = '.ferm-wrapped';
+     }
+ 
+     # Perl 5.24 requires this prefix or else it will only look in @INC