diff --git a/tests/default.nix b/tests/default.nix
index 18844be..bac6b61 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -3,6 +3,8 @@
 let
   testdata = import ./testdata.nix { inherit pkgs; };
   runner = import ./runner.nix { inherit pkgs; };
+  gitignoreNix = (import ../. { inherit lib; });
+  inherit (gitignoreNix) gitignoreSource;
 in
 {
   plain = runner.makeTest { name = "plain"; rootDir = testdata.sourceUnfiltered + "/test-tree"; };
@@ -10,10 +12,10 @@ in
 
   plain-with-testdata-dir = runner.makeTest { name = "plain"; rootDir = testdata.sourceUnfiltered; };
   nested-with-testdata-dir = runner.makeTest { name = "nested"; rootDir = testdata.sourceUnfilteredRecursive; };
-  
+
   plain-with-testdata-subdir = runner.makeTest { name = "plain"; rootDir = testdata.sourceUnfiltered; subpath = "test-tree"; };
   nested-with-testdata-subdir = runner.makeTest { name = "nested"; rootDir = testdata.sourceUnfilteredRecursive; subpath = "test-tree"; };
-  
+
   subdir-1 = runner.makeTest { name = "subdir-1"; rootDir = testdata.sourceUnfiltered + "/test-tree"; subpath = "1-simpl"; };
   subdir-1x = runner.makeTest { name = "subdir-1x"; rootDir = testdata.sourceUnfiltered + "/test-tree"; subpath = "1-xxxxx"; };
   subdir-2 = runner.makeTest { name = "subdir-2"; rootDir = testdata.sourceUnfiltered + "/test-tree"; subpath = "2-negation"; };
@@ -22,6 +24,58 @@ in
   subdir-9 = runner.makeTest { name = "subdir-9"; rootDir = testdata.sourceUnfiltered + "/test-tree"; subpath = "9-expected"; };
   subdir-10 = runner.makeTest { name = "subdir-10"; rootDir = testdata.sourceUnfiltered + "/test-tree"; subpath = "10-subdir-ignoring-itself"; };
 
+  # https://github.com/hercules-ci/gitignore.nix/pull/71
+  regression-config-with-store-path =
+    let
+      excludesfile = pkgs.writeText "excludesfile" "";
+      gitconfig = pkgs.writeText "gitconfig" ''
+        [core]
+            excludesfile = ${excludesfile}
+      '';
+    in
+    pkgs.stdenv.mkDerivation {
+      name = "config-with-store-path";
+      src = testdata.sourceUnfiltered + "/test-tree";
+      buildInputs = [ pkgs.nix ];
+      NIX_PATH="nixpkgs=${pkgs.path}";
+      buildPhase = ''
+        HOME=/build/HOME
+        mkdir -p $HOME
+
+        # it must be a symlink to the nix store.
+        # that way builtins.readFile adds in the relevant context
+        ln -s ${gitconfig} $HOME/.gitconfig
+
+        export NIX_LOG_DIR=$TMPDIR
+        export NIX_STATE_DIR=$TMPDIR
+
+        echo ---------------
+
+        # outside of a nix-build, the context of this would be non-empty (replaceing the ''${} with ())
+        # inside the nix build, it's empty.
+        # Arghhhh
+
+        nix-instantiate --eval --expr --strict --json --readonly-mode --option sandbox false \
+            'let pkgs = import <nixpkgs> {}; in builtins.getContext (builtins.readFile ${pkgs.writeText "foo" (toString pkgs.hello)})'
+
+        echo ---------------
+
+        if nix-instantiate --eval --expr \
+            --readonly-mode --option sandbox false \
+            '((import ${gitignoreSource ../.} {}).gitignoreSource ./.).outPath'
+        then touch $out
+        else
+          echo
+          echo "Failed to run with a global excludes file from the nix store."
+          echo "This may be because the store path gets misinterpreted as a string context."
+          echo "See https://github.com/hercules-ci/gitignore.nix/pull/71"
+          exit 1
+        fi
+      '';
+      preInstall = "";
+      installPhase = ":";
+    };
+
   # Make sure the files aren't added to the store before filtering.
   shortcircuit = runner.makeTest {
     name = "nested";
@@ -34,8 +88,7 @@ in
   };
 
   unit-tests =
-    let gitignoreNix = import ../default.nix { inherit (pkgs) lib; };
-        inherit (gitignoreNix) gitignoreFilterWith gitignoreSourceWith;
+    let inherit (gitignoreNix) gitignoreFilterWith gitignoreSourceWith;
         example = gitignoreFilterWith { basePath = ./.; extraRules = ''
           *.foo
           !*.bar