diff --git a/src/hastur.nim b/src/hastur.nim
index c259d78f..59ad639b 100644
--- a/src/hastur.nim
+++ b/src/hastur.nim
@@ -3,7 +3,7 @@
 
 import std / [syncio, assertions, parseopt, strutils, times, os, osproc, algorithm]
 
-import lib / nifindexes
+import lib / [nifindexes, lineinfos]
 import gear2 / modnames
 
 const
@@ -394,8 +394,8 @@ proc nifctests(overwrite: bool) =
 proc hexertests(overwrite: bool) =
   let mod1 = "tests/hexer/mod1"
   let helloworld = "tests/hexer/hexer_helloworld"
-  createIndex helloworld & ".nif", false
-  createIndex mod1 & ".nif", false
+  createIndex helloworld & ".nif", false, NoLineInfo
+  createIndex mod1 & ".nif", false, NoLineInfo
   execHexer mod1 & ".nif"
   execHexer helloworld & ".nif"
   execNifc " c -r " & mod1 & ".c.nif " & helloworld & ".c.nif"
diff --git a/src/lib/nifindexes.nim b/src/lib/nifindexes.nim
index 08b05547..bf204d4c 100644
--- a/src/lib/nifindexes.nim
+++ b/src/lib/nifindexes.nim
@@ -131,7 +131,7 @@ proc getSymbolSection(tag: TagId; values: seq[(SymId, SymId)]): TokenBuf =
 
   result.addParRi()
 
-proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections) =
+proc createIndex*(infile: string; root: PackedLineInfo; buildChecksum: bool; sections: IndexSections) =
   let indexName = changeFileExt(infile, ".idx.nif")
 
   var s = nifstreams.open(infile)
@@ -142,8 +142,8 @@ proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections)
 
   var public = createTokenBuf(30)
   var private = createTokenBuf(30)
-  public.addParLe TagId(PublicIdx)
-  private.addParLe TagId(PrivateIdx)
+  public.addParLe TagId(PublicIdx), root
+  private.addParLe TagId(PrivateIdx), root
   var buf = createTokenBuf(100)
   var symToOffsetMap = initTable[SymId, int]()
 
@@ -155,7 +155,7 @@ proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections)
     if t.kind == ParLe:
       target = offs
     elif t.kind == SymbolDef:
-      let info = t.info
+      #let info = t.info
       let sym = t.symId
       if pool.syms[sym].isImportant:
         let tb = next(s)
@@ -169,7 +169,7 @@ proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections)
         symToOffsetMap[sym] = target
         let diff = if isPublic: target - previousPublicTarget
                   else: target - previousPrivateTarget
-        dest[].buildTree TagId(KvIdx), info:
+        dest[].buildTree TagId(KvIdx), NoLineInfo:
           dest[].add symToken(sym, NoLineInfo)
           dest[].add intToken(pool.integers.getOrIncl(diff), NoLineInfo)
         if isPublic:
@@ -200,9 +200,8 @@ proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections)
     content.add toString(converterSectionBuf)
     content.add "\n"
 
-  let buildT = registerTag "build"
   var buildBuf = createTokenBuf()
-  buildBuf.addParLe buildT
+  buildBuf.addParLe TagId(BuildIdx)
   buildBuf.add sections.toBuild
   buildBuf.addParRi
   content.add toString(buildBuf)
@@ -219,8 +218,9 @@ proc createIndex*(infile: string; buildChecksum: bool; sections: IndexSections)
   else:
     writeFile(indexName, content)
 
-proc createIndex*(infile: string; buildChecksum: bool) =
-  createIndex(infile, buildChecksum, IndexSections(hooks: initTable[string, seq[(SymId, SymId)]](), toBuild: default(TokenBuf)))
+proc createIndex*(infile: string; buildChecksum: bool; root: PackedLineInfo) =
+  createIndex(infile, root, buildChecksum,
+    IndexSections(hooks: initTable[string, seq[(SymId, SymId)]](), toBuild: default(TokenBuf)))
 
 type
   NifIndexEntry* = object
@@ -365,4 +365,4 @@ proc readIndex*(indexName: string): NifIndex =
     assert false, "expected 'index' tag"
 
 when isMainModule:
-  createIndex paramStr(1), false
+  createIndex paramStr(1), false, NoLineInfo
diff --git a/src/nimony/sem.nim b/src/nimony/sem.nim
index 13d6df51..4e36a834 100644
--- a/src/nimony/sem.nim
+++ b/src/nimony/sem.nim
@@ -5471,7 +5471,8 @@ proc writeOutput(c: var SemContext; outfile: string) =
   #b.addRaw toString(c.dest)
   #b.close()
   writeFile outfile, "(.nif24)\n" & toString(c.dest)
-  createIndex outfile, true, IndexSections(hooks: c.hookIndexMap, converters: c.converterIndexMap, toBuild: c.toBuild)
+  let root = c.dest[0].info
+  createIndex outfile, root, true, IndexSections(hooks: c.hookIndexMap, converters: c.converterIndexMap, toBuild: c.toBuild)
 
 proc phaseX(c: var SemContext; n: Cursor; x: SemPhase): TokenBuf =
   assert n == "stmts"
diff --git a/tests/nimony/nosystem/timportfromexcept.nif b/tests/nimony/nosystem/timportfromexcept.nif
index e64fef28..da849702 100644
--- a/tests/nimony/nosystem/timportfromexcept.nif
+++ b/tests/nimony/nosystem/timportfromexcept.nif
@@ -1,12 +1,12 @@
 (.nif24)
 0,1,tests/nimony/nosystem/timportfromexcept.nim(stmts 4,4
  (let :allImported.0.timhjtr28 . .
-  (array 15,3,tests/nimony/nosystem/deps/modexcept.nim
+  (array 11,2,tests/nimony/nosystem/deps/modexcept.nim
    (i -1)
    (rangetype
     (i -1) +0 +2)) 14
   (aconstr ~14
-   (array 15,3,tests/nimony/nosystem/deps/modexcept.nim
+   (array 11,2,tests/nimony/nosystem/deps/modexcept.nim
     (i -1)
     (rangetype
      (i -1) +0 +2)) 1 exceptB.0.modvx9hpf 10 fromA.0.modepjal 17 fromC.0.modepjal)) 4,5
diff --git a/tests/nimony/sysbasics/tbasics.nif b/tests/nimony/sysbasics/tbasics.nif
index a2ac9789..f4979eea 100644
--- a/tests/nimony/sysbasics/tbasics.nif
+++ b/tests/nimony/sysbasics/tbasics.nif
@@ -152,19 +152,19 @@
     (dot ~1 x.1 a.0.tbawx6nu81 +0)))) 4,42
  (var :a.1.tbawx6nu81 . . 12,~3 Foo1314.0.tbawx6nu81 11
   (oconstr 1,~3 Foo1314.0.tbawx6nu81
-   (kv a.0.tbawx6nu81 52,841,lib/std/system.nim
+   (kv a.0.tbawx6nu81 43,421,lib/std/system.nim
     (expr
      (expr +0)))
-   (kv b.0.tbawx6nu81 52,841,lib/std/system.nim
+   (kv b.0.tbawx6nu81 43,421,lib/std/system.nim
     (expr
      (expr +0)))
-   (kv c.0.tbawx6nu81 52,841,lib/std/system.nim
+   (kv c.0.tbawx6nu81 43,421,lib/std/system.nim
     (expr
      (expr +0)))
-   (kv d.0.tbawx6nu81 52,841,lib/std/system.nim
+   (kv d.0.tbawx6nu81 43,421,lib/std/system.nim
     (expr
      (expr +0)))
-   (kv e.0.tbawx6nu81 52,841,lib/std/system.nim
+   (kv e.0.tbawx6nu81 43,421,lib/std/system.nim
     (expr
      (expr +0))))) 7,43
  (call ~7 foo1314.0.tbawx6nu81 1 a.1.tbawx6nu81))
\ No newline at end of file
diff --git a/tests/nimony/sysbasics/tconstarrlen.nif b/tests/nimony/sysbasics/tconstarrlen.nif
index 2b903f55..7d5c0498 100644
--- a/tests/nimony/sysbasics/tconstarrlen.nif
+++ b/tests/nimony/sysbasics/tconstarrlen.nif
@@ -19,8 +19,8 @@
     (i -1) +0 +99)) .) ,7
  (if 3
   (elif 6
-   (eq 24,603,lib/std/system.nim
-    (i +64) 11,940,lib/std/system.nim
+   (eq 15,134,lib/std/system.nim
+    (i +64) 2,471,lib/std/system.nim
     (expr
      (expr ,~4
       (expr
diff --git a/tests/nimony/sysbasics/tforloops1.nif b/tests/nimony/sysbasics/tforloops1.nif
index 8e88bc72..b80addef 100644
--- a/tests/nimony/sysbasics/tforloops1.nif
+++ b/tests/nimony/sysbasics/tforloops1.nif
@@ -17,7 +17,7 @@
       (mul
        (i -1) ~1 i.0 1 i.0)) ,2
      (yld 9
-      (mul 20,279,lib/std/system.nim
+      (mul 15,140,lib/std/system.nim
        (i +64) ~2
        (mul
         (i -1) ~1 i.0 1 i.0) 1 i.0)) 2,3
@@ -75,7 +75,7 @@
     (hconv 11,~16
      (cstring) "countup start\3A %ld\0A") 25 m.1) ,2
    (if 3
-    (elif 11,830,lib/std/system.nim
+    (elif 2,416,lib/std/system.nim
      (expr 2,1
       (lt
        (i -1) 9,26,tests/nimony/sysbasics/tforloops1.nim +5 5,26,tests/nimony/sysbasics/tforloops1.nim x.1)) ~1,1
@@ -121,7 +121,7 @@
       (mul ~1,~9
        (i -1) ~1 i.4 1 i.4)) ,2
      (yld 9
-      (mul 20,279,lib/std/system.nim
+      (mul 15,140,lib/std/system.nim
        (i +64) ~2
        (mul ~1,~10
         (i -1) ~1 i.4 1 i.4) 1 i.4)))))) 4,43
@@ -171,15 +171,15 @@
        (cstring) "Hello, world\3A %ld\0A") 25
       (add ~25,~6
        (i -1) ~1 m.2 1 n.3)))))) 4,20
- (proc :inc.0.tfo6yv57p . 5,551,lib/std/system.nim .
+ (proc :inc.0.tfo6yv57p . 0,276,lib/std/system.nim .
   (at inc.1.sys9azlf 19,~4
-   (i -1)) 26,551,lib/std/system.nim
+   (i -1)) 21,276,lib/std/system.nim
   (params 1
    (param :x.2 . . 3
     (mut 23,17,tests/nimony/sysbasics/tforloops1.nim
-     (i -1)) .)) 5,551,lib/std/system.nim . 37,551,lib/std/system.nim
+     (i -1)) .)) 0,276,lib/std/system.nim . 32,276,lib/std/system.nim
   (pragmas 2
-   (inline)) 5,551,lib/std/system.nim . 7,553,lib/std/system.nim
+   (inline)) 0,276,lib/std/system.nim . 2,278,lib/std/system.nim
   (stmts 2
    (asgn ~2
     (hderef x.2) 4
diff --git a/tests/nimony/sysbasics/tintlitmatch.nif b/tests/nimony/sysbasics/tintlitmatch.nif
index f65c814a..c1a93d41 100644
--- a/tests/nimony/sysbasics/tintlitmatch.nif
+++ b/tests/nimony/sysbasics/tintlitmatch.nif
@@ -38,19 +38,19 @@
  (discard 10
   (eq ~3,~4
    (i +32) ~2
-   (hconv 22,685,lib/std/system.nim
+   (hconv 17,343,lib/std/system.nim
     (i +64) x.0.tin4pj0od1) 3 y.0.tin4pj0od1)) ,14
  (discard 10
   (eq ~3,~4
    (i -1) ~2 y.0.tin4pj0od1 6
-   (hconv 22,685,lib/std/system.nim
+   (hconv 17,343,lib/std/system.nim
     (i +64)
     (conv 1
      (i +32) ~3 +123)))) ,15
  (discard 18
   (eq ~1,~1
    (i +32) ~7
-   (hconv 22,685,lib/std/system.nim
+   (hconv 17,343,lib/std/system.nim
     (i +64)
     (conv 6,~1
      (i +32) ~3 +123)) 3 y.0.tin4pj0od1)) ,16
@@ -73,17 +73,17 @@
    (i +32) ~7
    (conv 6,~6
     (i +32) ~3 +123) 3
-   (hconv 22,683,lib/std/system.nim
+   (hconv 17,342,lib/std/system.nim
     (i +32) +123))) ,21
  (discard 12
   (eq
    (i -1) ~4
-   (hconv 22,683,lib/std/system.nim
+   (hconv 17,342,lib/std/system.nim
     (i +32) +123) 6
    (conv ~1,~7
     (i +32) ~3 +123))) ,22
  (discard 10
   (eq ~3,~13
    (i +32) ~2 x.0.tin4pj0od1 3
-   (hconv 22,683,lib/std/system.nim
+   (hconv 17,342,lib/std/system.nim
     (i +32) +123))))
\ No newline at end of file