diff --git a/src/env_manager.c b/src/env_manager.c
index 1f528e7..f65b538 100644
--- a/src/env_manager.c
+++ b/src/env_manager.c
@@ -347,8 +347,14 @@ void jemPrintPackageClasspath(const char *name) {
     char *pkgs_str = calloc(strlen(name)+1,sizeof(char));
     char *cursor = pkgs_str;
     char *classpath = NULL;
+    int pkg_name_len;
+    int i;
     memcpy(cursor,name,strlen(name));
     while((pkg_name = strsep(&cursor,","))) {
+        pkg_name_len = strlen(pkg_name);
+        for( i=0; i<pkg_name_len; i++)
+            if(pkg_name[i] == ':')
+                pkg_name[i] = '-';
         package_found = false;
         struct jem_pkg *pkg = jemPkgLoadPackage(pkg_name);
         if(pkg) {