Backport SourcePath from the lazy-trees branch

This introduces the SourcePath type from lazy-trees as an abstraction
for accessing files from inputs that may not be materialized in the
real filesystem (e.g. Git repositories). Currently, however, it's just
a wrapper around CanonPath, so it shouldn't change any behaviour. (On
lazy-trees, SourcePath is a <InputAccessor, CanonPath> tuple.)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libexpr/flake/flake.cc b/src/libexpr/flake/flake.cc
index 81e94848a..2b858ee98 100644
--- a/src/libexpr/flake/flake.cc
+++ b/src/libexpr/flake/flake.cc
@@ -218,7 +218,7 @@ static Flake getFlake(
         throw Error("source tree referenced by '%s' does not contain a '%s/flake.nix' file", lockedRef, lockedRef.subdir);
 
     Value vInfo;
-    state.evalFile(flakeFile, vInfo, true); // FIXME: symlink attack
+    state.evalFile(CanonPath(flakeFile), vInfo, true); // FIXME: symlink attack
 
     expectType(state, nAttrs, vInfo, state.positions.add({flakeFile}, 1, 1));
 
@@ -731,7 +731,7 @@ void callFlake(EvalState & state,
         state.vCallFlake = allocRootValue(state.allocValue());
         state.eval(state.parseExprFromString(
             #include "call-flake.nix.gen.hh"
-            , "/"), **state.vCallFlake);
+            , CanonPath::root), **state.vCallFlake);
     }
 
     state.callFunction(**state.vCallFlake, *vLocks, *vTmp1, noPos);