diff --git a/.guix/modules/ogs-package.scm b/.guix/modules/ogs-package.scm
index 8ceff8b6660..215ec2814fc 100644
--- a/.guix/modules/ogs-package.scm
+++ b/.guix/modules/ogs-package.scm
@@ -19,6 +19,7 @@
   #:use-module (guix)
   #:use-module (guix packages)
   #:use-module (guix build-system cmake)
+  #:use-module (guix build-system copy)
   #:use-module (guix download)
   #:use-module (guix git-download)
   #:use-module ((guix licenses) #:prefix license:)
@@ -70,6 +71,7 @@
        #:cmake ,cmake)) ;for newer CMake version
     (inputs (list boost
                   eigen
+                  exprtk
                   hdf5
                   iphreeqc
                   json-modern-cxx
@@ -281,6 +283,27 @@
             `(#:tests? #f)
         )))
 
+(define exprtk
+      (package
+        (name "exprtk")
+        (home-page "https://www.partow.net/programming/exprtk/index.html")
+        (synopsis "C++ Mathematical Expression Parsing And Evaluation Library")
+        (description "")
+        (license license:expat)
+        (version "0.0.2")
+        (source (origin
+                  (method git-fetch)
+                  (uri (git-reference
+                    (url "https://github.com/ArashPartow/exprtk.git")
+                    (commit version)))
+                  (sha256
+                   (base32
+                    "1w92qlfjpcan38d88fak3avq81lkcpai5mqpbvrsfv04mi5nfpk5"))))
+        (build-system copy-build-system)
+        (arguments
+         '(#:install-plan '(("exprtk.hpp" "include/")))
+        )))
+
 ;; return package
 ogs
 
diff --git a/ThirdParty/collection b/ThirdParty/collection
index 860959625e7..a6070238d6c 160000
--- a/ThirdParty/collection
+++ b/ThirdParty/collection
@@ -1 +1 @@
-Subproject commit 860959625e7d9500c9ddb6e7b5b8af04a8a8744e
+Subproject commit a6070238d6c9561a1fac03c93b1f20f248683155
diff --git a/scripts/cmake/Dependencies.cmake b/scripts/cmake/Dependencies.cmake
index e42bab97b38..0e9b026ebeb 100644
--- a/scripts/cmake/Dependencies.cmake
+++ b/scripts/cmake/Dependencies.cmake
@@ -282,15 +282,19 @@ endif()
 #     find_package(ParaView REQUIRED)
 # endif()
 # ~~~
-CPMAddPackage(
-    NAME exprtk
-    GIT_REPOSITORY https://gitlab.opengeosys.org/ogs/libs/exprtk.git
-    GIT_TAG 2a5c62b93c9661470e69be572f22d821308b6f61
-    DOWNLOAD_ONLY YES
-)
-if(exprtk_ADDED)
+if(GUIX_BUILD)
     add_library(exprtk INTERFACE IMPORTED)
-    target_include_directories(exprtk SYSTEM INTERFACE ${exprtk_SOURCE_DIR})
+else()
+    CPMAddPackage(
+        NAME exprtk
+        GIT_REPOSITORY https://gitlab.opengeosys.org/ogs/libs/exprtk.git
+        GIT_TAG 2a5c62b93c9661470e69be572f22d821308b6f61
+        DOWNLOAD_ONLY YES
+    )
+    if(exprtk_ADDED)
+        add_library(exprtk INTERFACE IMPORTED)
+        target_include_directories(exprtk SYSTEM INTERFACE ${exprtk_SOURCE_DIR})
+    endif()
 endif()
 
 if(GUIX_BUILD)