diff --git a/.Rprofile b/.Rprofile
index e6cbf69..6a0f49a 100644
--- a/.Rprofile
+++ b/.Rprofile
@@ -9,8 +9,8 @@
 #   at run-time.
 {
     is_rstudio <- Sys.getenv("RSTUDIO") == "1"
-    is_nixr <- nzchar(Sys.getenv("NIX_STORE"))
-    if (isFALSE(is_nixr) && isTRUE(is_rstudio)) {
+    is_nix_r <- nzchar(Sys.getenv("NIX_STORE"))
+    if (isFALSE(is_nix_r) && isTRUE(is_rstudio)) {
         cat("{rix} detected RStudio R session")
         old_path <- Sys.getenv("PATH")
         nix_path <- "/nix/var/nix/profiles/default/bin"
@@ -20,13 +20,13 @@
         }
         rm(old_path, nix_path)
     }
-    if (isTRUE(is_nixr)) {
+    if (isTRUE(is_nix_r)) {
         current_paths <- .libPaths()
         userlib_paths <- Sys.getenv("R_LIBS_USER")
-        user_dir <- grep(paste(userlib_paths, collapse = "|"), current_paths)
+        user_dir <- grep(paste(userlib_paths, collapse = "|"), current_paths, fixed = TRUE)
         new_paths <- current_paths[-user_dir]
         .libPaths(new_paths)
         rm(current_paths, userlib_paths, user_dir, new_paths)
     }
-    rm(is_rstudio, is_nixr)
+    rm(is_rstudio, is_nix_r)
 }
diff --git a/default.nix b/default.nix
index 408f1e9..c63dd4c 100644
--- a/default.nix
+++ b/default.nix
@@ -1,6 +1,6 @@
-# This file was generated by the {rix} R package v0.7.0 on 2024-05-24
+# This file was generated by the {rix} R package v0.7.1 on 2024-06-09
 # with following call:
-# >rix(r_ver = "https://github.com/NixOS/nixpkgs/archive/3305b2b25e4ae4baee872346eae133cf6f611783.tar.gz",
+# >rix(r_ver = "cd18e2ae9ab8e2a0a8d715b60c91b54c0ac35ff9",
 #  > r_pkgs = c("targets",
 #  > "dplyr",
 #  > "ggplot2",
@@ -11,27 +11,36 @@
 #  > project_path = ".",
 #  > overwrite = TRUE,
 #  > print = TRUE)
-# It uses nixpkgs' revision 3305b2b25e4ae4baee872346eae133cf6f611783 for reproducibility purposes
-# which will install R version latest
+# It uses nixpkgs' revision cd18e2ae9ab8e2a0a8d715b60c91b54c0ac35ff9 for reproducibility purposes
+# which will install R version latest.
 # Report any issues to https://github.com/b-rodrigues/rix
 let
- pkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/3305b2b25e4ae4baee872346eae133cf6f611783.tar.gz") {};
+ pkgs = import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/cd18e2ae9ab8e2a0a8d715b60c91b54c0ac35ff9.tar.gz") {};
+ 
  rpkgs = builtins.attrValues {
-  inherit (pkgs.rPackages) targets dplyr ggplot2 readr here;
-};
-   system_packages = builtins.attrValues {
+  inherit (pkgs.rPackages) 
+      targets
+      dplyr
+      ggplot2
+      readr
+      here;
+ };
+   
+ system_packages = builtins.attrValues {
   inherit (pkgs) R glibcLocales nix;
-};
-  in
-  pkgs.mkShell {
-    LOCALE_ARCHIVE = if pkgs.system == "x86_64-linux" then  "${pkgs.glibcLocales}/lib/locale/locale-archive" else "";
-    LANG = "en_US.UTF-8";
-    LC_ALL = "en_US.UTF-8";
-    LC_TIME = "en_US.UTF-8";
-    LC_MONETARY = "en_US.UTF-8";
-    LC_PAPER = "en_US.UTF-8";
-    LC_MEASUREMENT = "en_US.UTF-8";
+ };
+  
+in
 
-    buildInputs = [  rpkgs  system_packages  ];
-      
-  }
+ pkgs.mkShell {
+   LOCALE_ARCHIVE = if pkgs.system == "x86_64-linux" then  "${pkgs.glibcLocales}/lib/locale/locale-archive" else "";
+   LANG = "en_US.UTF-8";
+   LC_ALL = "en_US.UTF-8";
+   LC_TIME = "en_US.UTF-8";
+   LC_MONETARY = "en_US.UTF-8";
+   LC_PAPER = "en_US.UTF-8";
+   LC_MEASUREMENT = "en_US.UTF-8";
+
+   buildInputs = [  rpkgs  system_packages  ];
+   
+ }
diff --git a/plots/plot.png b/plots/plot.png
deleted file mode 100644
index dde2ad1..0000000
Binary files a/plots/plot.png and /dev/null differ
diff --git a/result b/result
new file mode 120000
index 0000000..6b42e47
--- /dev/null
+++ b/result
@@ -0,0 +1 @@
+/nix/store/qq82s0zks1yxq4dwdmylcy182m9r35jf-nix-shell
\ No newline at end of file