diff --git a/conf/modules.config b/conf/modules.config
index 1f345793..b422c3fe 100644
--- a/conf/modules.config
+++ b/conf/modules.config
@@ -43,7 +43,7 @@ process {
     }
 
     withLabel: plink2 {
-        ext.conda = "bioconda::plink2==2.00a5.10"
+        ext.conda = "$projectDir/environments/plink2/environment.yml"
         ext.docker = 'ghcr.io/pgscatalog/plink2'
         ext.singularity = 'oras://ghcr.io/pgscatalog/plink2'
         ext.docker_version = ':2.00a5.10'
@@ -67,7 +67,7 @@ process {
     }
 
     withLabel: pyyaml {
-        ext.conda = "conda-forge::pyyaml==6.0"
+        ext.conda = "$projectDir/environments/pyyaml/environment.yml"
         ext.singularity = 'oras://ghcr.io/pgscatalog/pyyaml'
         ext.singularity_version = ':6.0-singularity'
         ext.docker = 'ghcr.io/pgscatalog/pyyaml'
diff --git a/environments/fraposa/environment.yml b/environments/fraposa/environment.yml
index 34612e75..b69cb02a 100644
--- a/environments/fraposa/environment.yml
+++ b/environments/fraposa/environment.yml
@@ -2,5 +2,6 @@ name: fraposa-pgsc
 channels:
   - conda-forge
   - bioconda
+  - nodefaults  
 dependencies:
-- fraposa-pgsc=1.0.0
\ No newline at end of file
+  - fraposa-pgsc=1.0.0
\ No newline at end of file
diff --git a/environments/pgscatalog_utils/environment.yml b/environments/pgscatalog_utils/environment.yml
index fbf645ed..86c3f114 100644
--- a/environments/pgscatalog_utils/environment.yml
+++ b/environments/pgscatalog_utils/environment.yml
@@ -2,5 +2,6 @@ name: pgscatalog-utils
 channels:
   - conda-forge
   - bioconda
+  - nodefaults  
 dependencies:
-- pgscatalog-utils=1.2.0
+  - pgscatalog-utils=1.2.0
diff --git a/environments/plink2/environment.yml b/environments/plink2/environment.yml
new file mode 100644
index 00000000..1f3bc091
--- /dev/null
+++ b/environments/plink2/environment.yml
@@ -0,0 +1,7 @@
+name: plink2
+channels:
+  - conda-forge
+  - bioconda
+  - nodefaults  
+dependencies: 
+  - plink2==2.00a5.10
\ No newline at end of file
diff --git a/environments/pyyaml/environment.yml b/environments/pyyaml/environment.yml
index 15cb9b73..a7573aff 100644
--- a/environments/pyyaml/environment.yml
+++ b/environments/pyyaml/environment.yml
@@ -2,6 +2,6 @@ name: pyyaml
 channels:
   - conda-forge
   - bioconda
-  - defaults
+  - nodefaults
 dependencies:
-- pyyaml=6.0.1
+  - pyyaml=6.0.1
diff --git a/environments/report/environment.yml b/environments/report/environment.yml
index 9b9bc4b5..43adc80f 100644
--- a/environments/report/environment.yml
+++ b/environments/report/environment.yml
@@ -2,6 +2,7 @@ name: report
 channels:
   - conda-forge
   - bioconda
+  - nodefaults  
 dependencies: 
   - r-jsonlite
   - r-dplyr
diff --git a/environments/zstd/environment.yml b/environments/zstd/environment.yml
index 39242d54..856cc981 100644
--- a/environments/zstd/environment.yml
+++ b/environments/zstd/environment.yml
@@ -2,5 +2,6 @@ name: zstd
 channels:
   - conda-forge
   - bioconda
+  - nodefaults  
 dependencies:
-- zstd=1.4.8
+  - zstd=1.4.8