Use new to-edn function to generate config.

mkClojureLib.nix

@@ -1,11 +1,16 @@
-{ lib, stdenv, callPackage, clojure, build-tools-jar, writeText }:
+{ lib, stdenv, callPackage, clojure, build-tools-jar, writeText, toEDN }:
 { src, name, group, version, clj-deps, src-paths }:
 
 with lib;
 let
 
-  build-tools-deps = ''
-    { :aliases { :build { :ns-build build :replace-deps { io.github.clojure/tools.build { :local/root "${build-tools-jar}" } } } } }'';
+  build-tools-deps = toEDN {
+    aliases.build = {
+      ns-build = "'build";
+      replace-deps."'io.github.clojure/tools.build"."local/root" =
+        "${build-tools-jar}";
+    };
+  };
 
   classpath = clj-deps.makeClasspaths { };
 
@@ -28,7 +33,7 @@ in stdenv.mkDerivation {
 
     clojure \
       -Scp     .:${build-tools-jar}:${classpath} \
-      -Sdeps   ${build-tools-deps} \
+      -Sdeps   ${builtins.trace build-tools-deps build-tools-deps} \
       -X:build \
       lib-uberjar \
       :project ${group}/${name} \