flake: Ensure paths are provided more correctly

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 3 insertions, 5 deletions

diff --git a/flake.nix b/flake.nix
index cdd50e6..9f1aafe 100644
--- a/flake.nix
+++ b/flake.nix
@@ -30,11 +30,9 @@
             (python3.withPackages test-python-packages)
             black
           ];
-          shellHook = ''
-            export SUBPLOT_DOT_PATH=${pkgs.graphviz}/bin/dot
-            export SUBPLOT_JAVA_PATH=${pkgs.jre}/bin/java
-            export SUBPLOT_PLANTUML_JAR_PATH=${pkgs.plantuml}/lib/plantuml.jar
-          '';
+          SUBPLOT_DOT_PATH = "${pkgs.graphviz}/bin/dot";
+          SUBPLOT_JAVA_PATH = "${pkgs.jre}/bin/java";
+          SUBPLOT_PLANTUML_JAR_PATH = "${pkgs.plantuml}/lib/plantuml.jar";
         };
       });
 }