diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 1e30ac8de..36d33095a 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -30,4 +30,4 @@ jobs:
         cd build/bin
 
         export OMP_NUM_THREADS=2
-        ./impactX
+        ./impactx
diff --git a/README.md b/README.md
index 28b3e7d03..9adf720eb 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ cmake --build build_perlmutter -j 10
 
 # run
 cd build_perlmutter/bin
-srun -N 1 --ntasks-per-node=4 -t 0:10:00 -C gpu -c 32 -G 4 --qos=debug -A m3906_g ./impactX
+srun -N 1 --ntasks-per-node=4 -t 0:10:00 -C gpu -c 32 -G 4 --qos=debug -A m3906_g ./impactx
 ```
 
 ### Cori KNL (NERSC)
@@ -92,7 +92,7 @@ cmake --build build_cori -j 8
 
 # run
 cd build_cori/bin
-srun -C knl -N 1 -t 30 -q debug ./impactX
+srun -C knl -N 1 -t 30 -q debug ./impactx
 ```
 
 ### Homebrew (macOS)
diff --git a/cmake/ImpactXFunctions.cmake b/cmake/ImpactXFunctions.cmake
index 280dc7b76..fda886b4f 100644
--- a/cmake/ImpactXFunctions.cmake
+++ b/cmake/ImpactXFunctions.cmake
@@ -159,7 +159,7 @@ function(set_ImpactX_binary_name)
         list(APPEND ImpactX_bin_names shared)
     endif()
     foreach(tgt IN LISTS _ALL_TARGETS)
-        set_target_properties(${tgt} PROPERTIES OUTPUT_NAME "impactX")
+        set_target_properties(${tgt} PROPERTIES OUTPUT_NAME "impactx")
 
         if(ImpactX_MPI)
             set_property(TARGET ${tgt} APPEND_STRING PROPERTY OUTPUT_NAME ".MPI")
@@ -198,7 +198,7 @@ function(set_ImpactX_binary_name)
         add_custom_command(TARGET app POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E create_symlink
                 $<TARGET_FILE_NAME:app>
-                ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/impactX
+                ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/impactx
         )
     endif()
     if(ImpactX_LIB)
@@ -210,7 +210,7 @@ function(set_ImpactX_binary_name)
         add_custom_command(TARGET shared POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E create_symlink
                 $<TARGET_FILE_NAME:shared>
-                $<TARGET_FILE_DIR:shared>/libImpactX.${lib_suffix}.${mod_ext}
+                $<TARGET_FILE_DIR:shared>/libimpactx.${mod_ext}
         )
     endif()
 endfunction()