diff --git a/default.nix b/default.nix
index 6f6010d..7649a46 100644
--- a/default.nix
+++ b/default.nix
@@ -137,6 +137,7 @@ lib.makeScope pkgs.newScope (self: {
     { projectDir ? null
     , pyproject ? projectDir + "/pyproject.toml"
     , poetrylock ? projectDir + "/poetry.lock"
+    , poetrylockPos ? { file = toString poetrylock; line = 0; column = 0; }
     , overrides ? self.defaultPoetryOverrides
     , python ? pkgs.python3
     , pwd ? projectDir
@@ -207,6 +208,7 @@ lib.makeScope pkgs.newScope (self: {
                   value = self.mkPoetryDep (
                     pkgMeta // {
                       inherit pwd preferWheels;
+                      pos = poetrylockPos;
                       source = pkgMeta.source or null;
                       # Default to files from lock file version 2.0 and fall back to 1.1
                       files = pkgMeta.files or lockFiles.${normalizedName};
diff --git a/mk-poetry-dep.nix b/mk-poetry-dep.nix
index 0541ef5..3ec0037 100644
--- a/mk-poetry-dep.nix
+++ b/mk-poetry-dep.nix
@@ -7,6 +7,7 @@
 }:
 { name
 , version
+, pos ? __curPos
 , files
 , source
 , dependencies ? { }
@@ -147,6 +148,8 @@ pythonPackages.callPackage
         in
         builtins.map (n: pythonPackages.${normalizePackageName n}) depAttrs;
 
+      inherit pos;
+
       meta = {
         broken = ! isCompatible (poetryLib.getPythonVersion python) python-versions;
         license = [ ];