diff --git a/Tupfile b/Tupfile
index 18138ee..4e8eb8c 100644
--- a/Tupfile
+++ b/Tupfile
@@ -1,2 +1,8 @@
 include_rules
+
 : sbom.json |> !sbom-to-nix |> | ./<lock>
+run ./Tuprules.jq sbom.json
+
+: foreach {bin} |> !assert_built |>
+: $(BIN_DIR)/msg |> !symlink |> $(BIN_DIR)/beep
+: $(BIN_DIR)/msg |> !symlink |> $(BIN_DIR)/assert
diff --git a/Tuprules.jq b/Tuprules.jq
new file mode 100755
index 0000000..58af1ef
--- /dev/null
+++ b/Tuprules.jq
@@ -0,0 +1,12 @@
+#! /usr/bin/env -S jq --raw-output --from-file
+.metadata.component.properties as $props |
+$props |
+  ["."] + (
+    map( select(.name | .[0:10] == "nim:srcDir") ) +
+    map( select(.name | .[0:10] == "nim:binDir") ) |
+    map(.value)) | .[-1] as $binDir |
+
+$props |
+  map( select(.name | .[0:8] == "nim:bin:") ) |
+  map( ": \($binDir)/\(.value).nim |> !nim_bin |> $(BIN_DIR)/\(.name[8:]) {bin}" ) |
+  join("\n")
diff --git a/Tuprules.tup b/Tuprules.tup
index 704673f..9ec7f07 100644
--- a/Tuprules.tup
+++ b/Tuprules.tup
@@ -1,4 +1,8 @@
 include ../syndicate-nim/depends.tup
+PROJECT_DIR = $(TUP_CWD)
+
 NIM = $(DIRENV) $(NIM)
-NIM_FLAGS += --path:$(TUP_CWD)/../syndicate-nim/src
-NIM_GROUPS += $(TUP_CWD)/<lock>
+NIM_FLAGS += --path:$(PROJECT_DIR)/../syndicate-nim/src
+NIM_GROUPS += $(SYNDICATE_PROTOCOL)
+NIM_GROUPS += $(PROJECT_DIR)/<lock>
+NIM_GROUPS += $(PROJECT_DIR)/<schema>
diff --git a/default.nix b/default.nix
index 9b922a8..97a5e69 100644
--- a/default.nix
+++ b/default.nix
@@ -5,15 +5,13 @@ with pkgs;
 let
   buildNimSbom = pkgs.callPackage (import <build-nim-sbom.nix>) { };
 in
-buildNimSbom ./sbom.json (
-  final: prev: {
-    src = if lib.inNixShell then null else lib.cleanSource ./.;
-    buildInputs = [
-      postgresql.out
-      sqlite
-      libxml2
-      libxslt
-      openssl
-    ];
-  }
-)
+buildNimSbom (finalAttrs: {
+  src = if lib.inNixShell then null else lib.cleanSource ./.;
+  buildInputs = [
+    postgresql.out
+    sqlite
+    libxml2
+    libxslt
+    openssl
+  ];
+}) ./sbom.json
diff --git a/src/Tupfile b/src/Tupfile
deleted file mode 100644
index 815dc7a..0000000
--- a/src/Tupfile
+++ /dev/null
@@ -1,5 +0,0 @@
-include_rules
-: foreach *.nim | $(SYNDICATE_PROTOCOL) ./<schema> |> !nim_bin |> {bin}
-: foreach {bin} |> !assert_built |>
-: $(BIN_DIR)/msg |> !symlink |> $(BIN_DIR)/beep
-: $(BIN_DIR)/msg |> !symlink |> $(BIN_DIR)/assert
diff --git a/src/schema/Tupfile b/src/schema/Tupfile
index f405409..adafa51 100644
--- a/src/schema/Tupfile
+++ b/src/schema/Tupfile
@@ -1,2 +1,2 @@
 include_rules
-: foreach ../../*.prs |> !preserves_schema_nim |> %B.nim | ../<schema>
+: foreach ../../*.prs |> !preserves_schema_nim |> %B.nim | $(PROJECT_DIR)/<schema>
diff --git a/src/syndesizer/Tupfile b/src/syndesizer/Tupfile
index 6406539..639cbf4 100644
--- a/src/syndesizer/Tupfile
+++ b/src/syndesizer/Tupfile
@@ -1,3 +1,3 @@
 include_rules
-: foreach *.nim | $(SYNDICATE_PROTOCOL) ../<schema> |> !nim_bin |> {bin}
+: foreach *.nim |> !nim_bin |> {bin}
 : foreach {bin} |> !assert_built |>
diff --git a/syndicate_utils.nimble b/syndicate_utils.nimble
index cd2582c..21ac773 100644
--- a/syndicate_utils.nimble
+++ b/syndicate_utils.nimble
@@ -9,7 +9,7 @@ proc lookupComponent(sbom: JsonNode; bomRef: string): JsonNode =
   result = newJNull()
 
 let
-  sbom = "sbom.json".readFile.parseJson
+  sbom = (getPkgDir() & "/sbom.json").readFile.parseJson
   comp = sbom{"metadata", "component"}
   bomRef = comp{"bom-ref"}.getStr
 
@@ -41,7 +41,7 @@ for prop in comp{"properties"}.getElems.items:
     add(backend, val)
   else:
     if key.startsWith "nim:bin:":
-      namedBin[key[9..key.high]] = val
+      namedBin[key[8..key.high]] = val
 
 for depend in sbom{"dependencies"}.items:
   if depend{"ref"}.getStr == bomRef: