diff --git a/lang/functions.go b/lang/functions.go
index dabffb669..d02b9fa88 100644
--- a/lang/functions.go
+++ b/lang/functions.go
@@ -41,22 +41,22 @@ func (s *Scope) Functions() map[string]function.Function {
 			"base64sha512":     funcs.Base64Sha512Func,
 			"bcrypt":           funcs.BcryptFunc,
 			"can":              tryfunc.CanFunc,
-			"ceil":             funcs.CeilFunc,
-			"chomp":            funcs.ChompFunc,
+			"ceil":             stdlib.CeilFunc,
+			"chomp":            stdlib.ChompFunc,
 			"cidrhost":         funcs.CidrHostFunc,
 			"cidrnetmask":      funcs.CidrNetmaskFunc,
 			"cidrsubnet":       funcs.CidrSubnetFunc,
 			"cidrsubnets":      funcs.CidrSubnetsFunc,
 			"coalesce":         funcs.CoalesceFunc,
-			"coalescelist":     funcs.CoalesceListFunc,
-			"compact":          funcs.CompactFunc,
+			"coalescelist":     stdlib.CoalesceListFunc,
+			"compact":          stdlib.CompactFunc,
 			"concat":           stdlib.ConcatFunc,
-			"contains":         funcs.ContainsFunc,
+			"contains":         stdlib.ContainsFunc,
 			"csvdecode":        stdlib.CSVDecodeFunc,
 			"dirname":          funcs.DirnameFunc,
-			"distinct":         funcs.DistinctFunc,
-			"element":          funcs.ElementFunc,
-			"chunklist":        funcs.ChunklistFunc,
+			"distinct":         stdlib.DistinctFunc,
+			"element":          stdlib.ElementFunc,
+			"chunklist":        stdlib.ChunklistFunc,
 			"file":             funcs.MakeFileFunc(s.BaseDir, false),
 			"fileexists":       funcs.MakeFileExistsFunc(s.BaseDir),
 			"fileset":          funcs.MakeFileSetFunc(s.BaseDir),
@@ -67,53 +67,53 @@ func (s *Scope) Functions() map[string]function.Function {
 			"filesha1":         funcs.MakeFileSha1Func(s.BaseDir),
 			"filesha256":       funcs.MakeFileSha256Func(s.BaseDir),
 			"filesha512":       funcs.MakeFileSha512Func(s.BaseDir),
-			"flatten":          funcs.FlattenFunc,
-			"floor":            funcs.FloorFunc,
+			"flatten":          stdlib.FlattenFunc,
+			"floor":            stdlib.FloorFunc,
 			"format":           stdlib.FormatFunc,
 			"formatdate":       stdlib.FormatDateFunc,
 			"formatlist":       stdlib.FormatListFunc,
-			"indent":           funcs.IndentFunc,
-			"index":            funcs.IndexFunc,
-			"join":             funcs.JoinFunc,
+			"indent":           stdlib.IndentFunc,
+			"index":            funcs.IndexFunc, // stdlib.IndexFunc is not compatible
+			"join":             stdlib.JoinFunc,
 			"jsondecode":       stdlib.JSONDecodeFunc,
 			"jsonencode":       stdlib.JSONEncodeFunc,
-			"keys":             funcs.KeysFunc,
+			"keys":             stdlib.KeysFunc,
 			"length":           funcs.LengthFunc,
 			"list":             funcs.ListFunc,
-			"log":              funcs.LogFunc,
+			"log":              stdlib.LogFunc,
 			"lookup":           funcs.LookupFunc,
 			"lower":            stdlib.LowerFunc,
 			"map":              funcs.MapFunc,
 			"matchkeys":        funcs.MatchkeysFunc,
 			"max":              stdlib.MaxFunc,
 			"md5":              funcs.Md5Func,
-			"merge":            funcs.MergeFunc,
+			"merge":            stdlib.MergeFunc,
 			"min":              stdlib.MinFunc,
-			"parseint":         funcs.ParseIntFunc,
+			"parseint":         stdlib.ParseIntFunc,
 			"pathexpand":       funcs.PathExpandFunc,
-			"pow":              funcs.PowFunc,
+			"pow":              stdlib.PowFunc,
 			"range":            stdlib.RangeFunc,
 			"regex":            stdlib.RegexFunc,
 			"regexall":         stdlib.RegexAllFunc,
 			"replace":          funcs.ReplaceFunc,
-			"reverse":          funcs.ReverseFunc,
+			"reverse":          stdlib.ReverseListFunc,
 			"rsadecrypt":       funcs.RsaDecryptFunc,
 			"setintersection":  stdlib.SetIntersectionFunc,
-			"setproduct":       funcs.SetProductFunc,
+			"setproduct":       stdlib.SetProductFunc,
 			"setsubtract":      stdlib.SetSubtractFunc,
 			"setunion":         stdlib.SetUnionFunc,
 			"sha1":             funcs.Sha1Func,
 			"sha256":           funcs.Sha256Func,
 			"sha512":           funcs.Sha512Func,
-			"signum":           funcs.SignumFunc,
-			"slice":            funcs.SliceFunc,
-			"sort":             funcs.SortFunc,
-			"split":            funcs.SplitFunc,
+			"signum":           stdlib.SignumFunc,
+			"slice":            stdlib.SliceFunc,
+			"sort":             stdlib.SortFunc,
+			"split":            stdlib.SplitFunc,
 			"strrev":           stdlib.ReverseFunc,
 			"substr":           stdlib.SubstrFunc,
 			"timestamp":        funcs.TimestampFunc,
-			"timeadd":          funcs.TimeAddFunc,
-			"title":            funcs.TitleFunc,
+			"timeadd":          stdlib.TimeAddFunc,
+			"title":            stdlib.TitleFunc,
 			"tostring":         funcs.MakeToFunc(cty.String),
 			"tonumber":         funcs.MakeToFunc(cty.Number),
 			"tobool":           funcs.MakeToFunc(cty.Bool),
@@ -121,19 +121,19 @@ func (s *Scope) Functions() map[string]function.Function {
 			"tolist":           funcs.MakeToFunc(cty.List(cty.DynamicPseudoType)),
 			"tomap":            funcs.MakeToFunc(cty.Map(cty.DynamicPseudoType)),
 			"transpose":        funcs.TransposeFunc,
-			"trim":             funcs.TrimFunc,
-			"trimprefix":       funcs.TrimPrefixFunc,
-			"trimspace":        funcs.TrimSpaceFunc,
-			"trimsuffix":       funcs.TrimSuffixFunc,
+			"trim":             stdlib.TrimFunc,
+			"trimprefix":       stdlib.TrimPrefixFunc,
+			"trimspace":        stdlib.TrimSpaceFunc,
+			"trimsuffix":       stdlib.TrimSuffixFunc,
 			"try":              tryfunc.TryFunc,
 			"upper":            stdlib.UpperFunc,
 			"urlencode":        funcs.URLEncodeFunc,
 			"uuid":             funcs.UUIDFunc,
 			"uuidv5":           funcs.UUIDV5Func,
-			"values":           funcs.ValuesFunc,
+			"values":           stdlib.ValuesFunc,
 			"yamldecode":       ctyyaml.YAMLDecodeFunc,
 			"yamlencode":       ctyyaml.YAMLEncodeFunc,
-			"zipmap":           funcs.ZipmapFunc,
+			"zipmap":           stdlib.ZipmapFunc,
 		}
 
 		s.funcs["templatefile"] = funcs.MakeTemplateFileFunc(s.BaseDir, func() map[string]function.Function {