diff --git a/README.md b/README.md
index 9a3c20a..1c26548 100644
--- a/README.md
+++ b/README.md
@@ -53,8 +53,12 @@ OPTIONS
 
        --list-r6rs List supported R6RS implementations.
 
+       --list-r6rs-except List supported R6RS implementations, except ones given.
+
        --list-r7rs List supported R7RS implementations.
 
+       --list-r7rs-except List supported R7RS implementations, except ones given.
+
        --list-all List all supported implementations.
 
        --version Show the software version.
diff --git a/libs/data.sld b/libs/data.sld
index f8622b3..be84159 100644
--- a/libs/data.sld
+++ b/libs/data.sld
@@ -438,7 +438,7 @@
                               ,script-file
                               " "
                               ,args)))))
-    #;(larceny
+    (larceny
     (type . interpreter)
     (command . ,(lambda (exec-cmd
                           script-file
diff --git a/libs/util.sld b/libs/util.sld
index 2a7f998..2ce6477 100644
--- a/libs/util.sld
+++ b/libs/util.sld
@@ -61,7 +61,7 @@
                             guile
                             ikarus
                             ironscheme
-                            ;larceny
+                            larceny
                             loko
                             mosh
                             racket
@@ -77,7 +77,7 @@
                             gauche
                             guile
                             kawa
-                            ;larceny
+                            larceny
                             loko
                             meevax
                             mit-scheme
@@ -100,7 +100,7 @@
                            ikarus
                            ironscheme
                            kawa
-                           ;larceny
+                           larceny
                            loko
                            meevax
                            mit-scheme